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1.The students are asked to prove the purity of copper.

1.要求学生们检验铜的纯度

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2.The silver vase had been hallmarked at Birmingham.

2.这个银瓶是在伯明翰打上纯度标记的。

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3.The high purity amidinothiourea phosphate (P800) was reacted with the dicyanodiamide and phosphoric acid.

3.摘要利用双氰胺和磷酸反应得到高纯度脒基脲磷酸盐P800。

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4.Results Pure flavonol and flavanonol were obtained by the column chromatography of polyamide.

4.结果运用聚酰胺法一次分离得高纯度黄酮醇与二氢黄酮醇。

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5.We can guarantee it pure.

5.我们可以保证它的纯度

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6.The purity 99.99% of scandium oxide(Sc 2O 3) was prepared from tungstenic slag with extraction process.

6.用萃取法从钨矿渣制得纯度为99.99%的氧钪。

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7.The main products of PET supercritical methanolysis are dimethyl terephthalate(DMT) and ethylene glycol(EG).

7.红外光检测解聚产物是纯度很高的对苯二甲酸二甲酯(DMT)单体和二醇。

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8.The 2,6 dipicrylamino 3,5 dinitro pyridine(PYX)pureness reference material had been certificated by potentiometric method.

8.用电位滴定法对2,6-双(苦氨基)-3,5-二硝基吡啶(PYX)标准物质的纯度进行测定。

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9.Its advantages include high purity of carotin crystal, low acidity of the oil solution of carotin and stable quality.

9.本发明获得的胡萝卜素晶体纯度高,胡萝卜素油溶品酸价低、质量稳定。

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10.Dichlorofluorobenzene is prepared by diazotizating of 2,4-dichloro aniline and substituting of 2,4-dichloro diazo benzene with fluorinion.

10.在此概述了由2,4-二氯苯胺经过重氮制得2,4-二氯氟苯的生产新工艺,产品纯度达到99。

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11.Therefore,it is important to control strictly reaction conditions for removing cystine's mesoisomer and making L-cystine of high optical purity.

11.严格控制反应条件,分离除去内消旋胱氨酸是制取高光学纯度L-胱氨酸的重要措施。

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12.This paper texted the process to prepare metadoxine from vitamine B6 hydrochloric acid salt ,pyroglutamic acid and isoproanol.

12.本文以维生素B6氯氢盐、焦谷氨酸和异丙醇为原料,固相合成美他多辛,纯度达96.3%。

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13.Heptanone with purity being 98.5% was synthesized by ethyl acetoacetate.The yield is 58.9%,and its application in the related fields were discussed.

13.酯法合成了2-庚酮,总得率为58.9%,纯度为98.5%.介绍了2-庚酮在相关领域中的应用.

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14.The mixture was refined by sodium sulfide and sodium hydroxide to afford an O,O-diethyl thiophosphoryl chloride at a purity of 99%.

14.该粗品通过精制工艺的改进,采用硫钠和氢氧钠的混合物进行处理,得到纯度≥99%的O,O-二基硫代磷酰氯。

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15.The results showed that the purity of Zincite as product was more than 99.6%in according with the requirements of grade A products.

15.试验结果表明,其产品氧纯度可达99.6%以上,符合一级品的要求。

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16.Recent method of synthesizing 3,5-xylenol is sulpho alkaline fusion of dimethylbenzene,it is a very complicated procedure with serious pollution and low-pure products.

16.国内目前生产工艺是间二甲苯的磺碱熔法,该方法工艺过程复杂、污染严重,并且产品纯度不高。

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17.Through the simple method of CTAB, total DNA of velvetleaf was extracted from sprouts of velvetleaf in which there was a little secondary metabolites.

17.本研究利用黄酮等次生代谢物未大量合成的青麻幼芽为材料,采用简CTAB法提取青麻总DNA,可以获得高纯度、高产量的DNA。

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18.The improvement of the purity of fluorene is not dependent on the removal of acenaphthene and dibenzofuran, but dependent on the separation of other impurities.

18.纯度的提高主要不是依赖苊、氧芴的去除,而是其它杂质的分离。

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19.Etodolac was synthesized with 7-ethyltryptophol and methyl 3-oxopentanoate as the starting materials.Highly pure etodolac was obtained by purifying the crude product with a mixing solvent.

19.以7-醇和3-氧代戊酸甲酯为起始原料,以甲醇为溶剂,合成了依托度酸.采用混合溶剂对粗品进行精制,得到了高纯度的依托度酸.

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20.They are the silent spectators of prakrti (matter or nature), which is composed of three gunas (dispositions): satva, rajas and tamas (steadiness, activity and dullness).

20.它们是帕克提(物质或自然)的无声观众,是由三重的根拿斯(部署)组成:萨特瓦,拉杰斯和塔玛斯(坚定性,活跃性和纯度)。

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NPR音讯 2019年7月合集

1.The uranium is only enriched to about 3.5%. It cannot be used for a bomb.

浓缩铀纯度只有3.5%左右。这一纯度不能用来制造炸弹。

「NPR音讯 2019年7月合集」评价该例句:好评差评指正
VOA Special 2023年12月合集

2.And they discussed the mineral content and purity.

他们讨论了矿物含量和纯度

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昆虫王国第二季 (原声版)

3.This technique guarantees the purity of the silk.

这种技术能保证丝纯度

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VOA Special 2024年6月合集

4.The purity must be high if it is to be used to carry electricity.

如果要用来导电,纯度必须

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60秒-美国人 2023年1月合集

5.Bottled water companies often brag about the purity of their drinks.

瓶装水公司通常会夸耀自家水纯度

「60秒-美国人 2023年1月合集」评价该例句:好评差评指正
Scishow 精选系列

6.A hunk of pure iron, for example, doesn't tend to stay pure for very long.

例如,一大块纯铁不能长时间保持它纯度

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华尔街日报

7.The traditional marketing strategy for bottled water as a premium product was all about purity.

传统瓶装水作为端产品营销策略全在于“纯度”。

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BBC 听力 2023年3月合集

8.Weapons grade uranium is 90%. Bethany Bell reports.

武器级浓缩铀纯度为 90%。·尔报道。

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《这个杀手不太冷》原声版

9.In June, we gave you the dope, it tests 100 percent pure.

六月份我们把毒品给你时候,纯度还是百分之百。

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NPR音讯 2013年3月合集

10.For Iran to build a nuclear weapon it would need a stockpile of uranium enriched to weapons-grade purity.

伊朗将需要铀浓缩储备来制造纯度武器。

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宇宙奇迹

11.This is the gold as it comes out of the ground, and it's unusually pure as gold goes.

刚出土金矿就是这样,异乎寻常纯度金矿。

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BBC纪录片《百件藏品话沧桑》

12.It didn't really matter what shape the metal was, just how much it weighed and how pure it was.

形状并不要紧,重要是重量和纯度

「BBC纪录片《百件藏品话沧桑》」评价该例句:好评差评指正
PBS趣味

13.A government could guarantee a coin's purity by stamping their official seal on a lump of metal.

政府可以通过在一块金属上盖上官方印章来保证硬币纯度

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BBC纪录片《百件藏品话沧桑》

14.The stamps on them are the guarantee of the weight and the purity.

货币上印记便是重量及纯度保证。

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译林版牛津中英语(选修7)

15.First, he was unable to find a procedure to make penicillin pure enough to work as a medince.

第一,他无法找到一种方式使青霉素达到药物纯度

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VOA Daily Standard 2023年9月合集

16.Uranium enriched at 60 percent purity is just a step away from weapons-grade levels of 90 percent.

纯度达到60%浓缩铀距离武器级别90%只有一步之遥。

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BBC 听力 2023年3月合集

17.In reports seen by the BBC, the agency said the particles were enriched up to 83.7 % purity.

在BBC看到报道中,该机构表示,这些颗粒物纯度达83.7%。

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60秒-美国人 2019年4月合集

18.This is a silica that the pineapple plant processes on its own, and it is of very high purity.

“这是菠萝自己加工而成二氧化硅,纯度非常。”

「60秒-美国人 2019年4月合集」评价该例句:好评差评指正
NPR音讯 2014年11月合集

19.The stopping of the stockpiling of Iran's 20 percent-enriched uranium — its most sensitive fuel — that's gone.

伊朗已经停止20%纯度浓缩铀储备工作,这是其最为敏感燃料。

「NPR音讯 2014年11月合集」评价该例句:好评差评指正
BBC纪录片《百件藏品话沧桑》

20.The Lydians hit on the idea of the state, or the king, issuing standard weights and standard purity.

吕底亚人选择让国家或国王来确定重量与纯度标准。

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