有奖纠错
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Ethyl phenylacrylate intermediate bringing a double bond was introduced first,which is subsequently transformed into triketone and then DCM was obtained with high purity.

采用具有烯烃β-苯基丙烯酸酯为中体先引入双键,合环制备乙烯基吡喃。

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Old Line State, old master, Old Norse, Old North French, Old Saxon, old school, old school tie, Old South, old style, Old Testament,

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当月 CNN 10 学生英语 2019年9月合集

I think this is the first time we have real hardware of something that is capable, with a little evolution, of - - of being something that could create a self-sustaining city on Mars and a base on the moon.

我认为这是我第一次拥有真正的硬件,这些硬件经过一定的发展,也许我以在火星上建立一个自我维持的城市,并在月球上建立一个基地。

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经济学人-科技

The waves are then reflected back from areas where there is a change in density and on their return the transducer works in reverse, producing a signal which the scanner can process into a digital image.

超声波会从密度发生变化的介质反射回来,这时压电式换能器会反向操作产生信号,经过扫描器的处理,最后进行数字成像。

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双语版 TED-Ed 演讲精选

But even then, it took another hundred years for an accurate description of blood flow to emerge, and two hundred more for the theory of the Four Humours to fade.

但即便如此,还是等了一百年的时间才出现对血流的正确描述,经过两百多年,四体液学说才慢慢失。

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Crash Course 解剖生理学篇

So there's essentially a traveling pool of urea that escapes the urine, finds its way back into the loop of Henle, and then runs the whole course again back to the collecting duct — an ammonia-scented cycle called urea recycling.

形成了一个流动的尿素池尿素从尿液中出,找到了回到亨利氏袢系统的路,然后经过整个过程回到收集管道——这个散发着氨香味的循环叫做尿素回收。

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美食家基地

The secret is their signature jalapeno mash, which is perfectly ripened jalapeno peppers that are salted and then aged for two to four weeks, to accentuate the fruity flavours.

秘诀在于他招牌的墨西哥辣椒泥,这是用完全成熟的墨西哥辣椒经过盐腌制,经过两到四周的陈酿,以突出水果的味道。

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当月 CNN 10 学生英语 2021年10月合集

They believe that if they have, it won't transit or cross in front of its star again for another 70 years.

认为,如果有的话,在接下来的70年里,它不会经过或穿过它的恒星。

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CGTN

Water from the Padma River is pumped to the main plant, where it goes through 5 processes including filtration and disinfection, before it becomes purified water.

来自博多河的河水会先被抽送到主厂,经过等5道工序,最后制成净化水。

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精选英语短文

In one chamber, air could be sprayed with water, before moving through plates that acted as filters to take out dust.

在一个腔室里,空气经由水雾加湿,经过器板来除尘。

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新课标人教版高中英语(必修3)

The water flows into the Niagara River and over the falls on its way to the sea.

经过大瀑布,流向大海。

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海底两万里(原版)

For a fare of twenty francs, the vehicle went down Broadway to Union Square, took Fourth Ave.

马车从百老汇路直到团结广场,经过第四号路到包法利街的十字路口。

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头脑特工队2

You still have about ten years, two graduations, and a best friend's wedding before you're invited.

你还有大约10年的时间,经过两次毕业和一场闺蜜的婚礼,你才会受到邀请。

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Who Smarted? - Educational Podcast for Kids

Mixed with water, which is then flattened and dried.

与水混合后,经过压平和干燥处理。

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探索科学奥秘

Once the different parts of your body grab the oxygen from the blood, that blood goes back to the heart so that it can go on that side racetrack to the lungs and get more oxygen again.

一旦身体各部位从血液中获取了氧气,这些血液会返回心脏, 经过那条“侧向赛道” 到达肺部,重新获取更多的氧气。

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湖底女人(上)

From this angle I could see that his service porch gave on a flight of painted wooden steps to a sloping concrete walk and a flight of concrete steps ending in the paved alley below.

从这个角度, 我以看到他的服务门廊从一段涂漆的木台阶延伸到一条倾斜的混凝土步道, 经过一段混凝土台阶终止于下面的铺砌小巷。

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科技智慧坊

The wafer next goes to the developer to wash away the sections that were hit by the light from the lithography tool and then through a hard bake to harden the remaining photoresist.

然后将硅片送到显影工序,洗去受光刻机光线照射的部分,经过高温烘烤使剩余的光刻胶硬化。

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Tools and Weapons with Brad Smith

And all the movies we were going to get were going to come from the studios after they played in theaters, after they went to home video, after they went to pay-per-view.

原本能拿到的所有电影,都得等它在影院上映后,经过家庭录像带发行,最后通过按次付费观看渠道之后才能获得。

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English Learning for Curious Minds

More often than not, they would return on land, revisiting Rome, before heading to Venice through cities such as Loreto, Ancona and Ravenna.

大多数情况下,他会返回陆地,重新访问罗马,然后经过洛雷托、安科纳和拉文纳等城市前往威尼斯。

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建筑奇遇记

Why do we have to go through approvals and approvals and through these people and these people and just waste so much time?

为何我非得一次次地审批、审批,还要经过这些人、那些人,白白浪费那么多时间呢?

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The British History Podcast

Instead, he would have to go through Normandy, and then through Maine, and then through Anjou, before finally reaching his new rental.

相反, 他得先穿过诺曼底,经过曼恩, 然后穿过安茹,才能最终抵达他新租的地方。

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Core IM | Internal Medicine Podcast

We're going to start with most potent, and then we're going to finish up with the tried and true, but least potent.

将从最强效的开始,然后最后经过验证且最不强效的。

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3G, 401(K), a,
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