These chemicals are practically insoluble in water.
这些化几乎不溶于水。
Dyes come from plants or from chemicals.
染料是从植或化中得来的。
Have you studied the composition of the chemicals?
你研究过这种药品的成分了吗?
Semimetallic chemical element, chemical symbol B, atomic number 5.
半金属的化元素，化符号B，原子序数5。
We put chemicals in test tubes in our chemistry class.
我们上化课时把化药品放进试管里。
The fission of the cell could be inhibited with certain chemicals.
细胞的裂变可以通过些化药品加以抑制。
Certain chemicals are easily absorbed into the bloodstream, while others are not.
些化药品很容易溶于血液, 有些则不行。
Now scientists have learned to make rain by salting clouds with certain chemicals.
如今, 科家已经掌握了把些化撒在云层上以人工造雨的方法。
These chemicals make the fruit inedible.
这些化品使这种水果不宜食用。
As chemical reagent and corrodent of integrated plate.
作化试剂和集成路镀板的消蚀剂。
The same water was reused after chemical treatment.
原来的水经过化处理之后再度使用。
Chemicals are used to keep the insects down.
化药品用于阻止昆虫滋生。
What are the chemical reaction characteristics of tropane alkaloids?
氢溴酸东莨菪碱的鉴别原理是什么？
Choice having introduced the hammerhead and cleading chemical composition.
介绍了锤头和衬板化成分的选择。
The chemical fertilizer should be well dug in.
化肥料应该均匀地混入土壤中。
Chemical modification including oxygenation, esterify, graft copolymerization and so on.
化改性主要有氧化、交联、酯化和接枝共聚。
The chemical must be salted out and allowed to dry.
必须把这种化加盐分离出来并让它变干。
The heat brings about a chemical reaction, and oxygen is liberated.
热量引起化反应, 释放出氧气。
A catalyst is a substance which speeds up a chemical reaction.
催化剂是一种能加速化反应的。
Chemicals in the body break our food down into useful substances.
人体中的化元素把食分解成有用的。
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They analyzed bacteria, fungi, parasites and chemicals.
他们分析了细菌、真菌、寄生虫和学物质。
Asthma attacks can be triggered by pollen, dust, harsh chemicals or scents.
花粉、灰尘、刺激性学物质或气味可引发哮喘。
It was easy to get the chemicals, but he needed the bodies.
添加剂很容易得到，但是没有测试者。
Cigarette smoke contains 69 chemicals that are known to cause cancer.
香烟含有69种致癌学物质。
It also generates reactive chemicals that attack the microbes from within.
它还能产生活性学物质，这种学物质能从击微生物。
There are two important chemicals found in all our brains - dopamine and acetylcholine.
多巴胺和乙酰胆碱。
For bioluminescence, creatures require two unique chemicals.
为了生物发光，生物需要两种独学物质。
Now, how did you discover these chemicals?
你们是怎样发现学品？
Carrying the hurt or anger of an offense leads the body to release stress chemicals.
满怀冒犯后伤害或愤怒会导致身体释放压力学物质。
Never use harsh chemicals that can discolor the boot.
千万不要使用强效学物质，以免靴子褪色。
They like the chemicals from a person's body.
它们喜欢人体中学物质。
Industries pollute rivers by dumping poisonous chemicals into them.
工业企业向河流倾倒有毒学物质，污染了水源。
A train derailment earlier this month spilled toxic chemicals.
本月早些时候，一列火车脱轨，泄漏了有毒学物质。
Exercise releases endorphins which are natural feel-good chemicals in the body.
运动可以释放啡肽，这是一种让人感觉良好天然学物质。
Scientists believe there might be such chemicals lying at the bottom of Europa's ocean.
科学家认为木卫二地表下海床上一定存在这些学物质。
These ozone-destroying chemicals are used in aerosol sprays on Earth.
这种能够破坏臭氧层学物质在地球上用于气雾喷雾器。
The light emitted by your devices releases wakeful chemicals in your brain.
设备屏幕光会在大脑中释放出让人清醒学物质。
If we mix these two chemicals together, they will form an acid.
如果我们把这两种学物混合在一起，他们会形成酸。
In the fields, farmers use too many chemicals which destroy the soil.
农民在田地里用了太多学品，破坏了土壤。
The receptor samples the waxy chemicals on the skin of his love interest.
这种感受器检验潜在伴侣皮肤上蜡状学物质。
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