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chemical

美音:[´keməkəl ]点这儿播放单词美音发声
英音:[´keməkəl ]点这儿播放单词英音发声
adj.化学的 n.[常pl.] 化学制品,化学药品 n.化学药品

难易程度:

chemical为高中词汇   词频:4501

词形变化:

副词:chemically

词根

-ical 表“有关”、“~性的”之意,重音一般在-ical之前的音节

chemical


/'kemɪkl; `kɛmɪkl/
adj
1 of or relating to chemistry 化学的; 关于化学的
*the chemical industry 化学工业.
2 produced by or using chemistry or chemicals 用化学方法或化学品产生的或生产的
*a chemical experiment 化学实验
* a chemical reaction, ie one causing changes in the structure of atoms or molecules 化学反应(造成原子或分子结构变化的反应).

n substance obtained by or used in a chemical process 在化学反应中得到的或使用的物质.
1. But even the mosquito has been subdued by attention to drainage and by chemical sprays.
    然而即使蚊子,也由于我们注意清理污水和喷洒化学药品就被制服了。

2. The waste of this chemical factory contaminates the environment.
    这家化工厂的废物污染了环境。

3. The chemical formula for salt is NaCl.
    盐的化学分子式是NaCl.

4. There are thirty microscopes in our chemical laboratory.
    我们的化学实验室里有三十台显微镜。

5. This applies particularly to chemical industries, where chance discoveries play a much larger part than they do in physical and mechanical industries.
    在这化学工业方面尤为突出。同物理和机械工业相比,化学工业中偶然发现的机会要多得多。

6. The paper-making process uses large amounts of water, burns fossil fuels and produces much chemical waste.
    因为造纸工艺要用去大量的水,燃烧大量的矿物燃料,而且还会产生大量的化学废料。

7. He is majoring in chemical engineering.
    他正主修化学工程。

8. He is a famous chemical expert.
    他是一位出名的化学专家。

9. During a single crucial three-week period during our teenage years, chemical activity in the brain is cut in half.
    我们的青少年阶段有一个为期三周的关键时期,此时脑部的化学反应活动一分为二。

10. A chemical changetakes place in paper when it burns.
    纸燃烧时产生化学反应.

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