基础释义
例句

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petroleum chemicals是什么意思？

petroleum chemicals

相关单词 petroleum chemicals

例句

Scientists tried out thousands of chemicals before they found the right one. 科学家们试验了数千种的化学药品才找到一种合适的。
A police put some chemicals on the piece of paper and a line of words showed up. 一位警察在一张条上涂上化学药品, 一行字迹清晰地显现出来。
Chemicals are used to keep the insects down. 化学药品用于阻止昆虫滋生。
inflammable chemicals 易燃的化学品
chemicals that are very ineffective in killing weeds 完全不能有效清除杂草的化学品
An imbalance in certain chemicals leads to disturbances in the brain’s function. 某些化学成分失衡会道致大脑功能的紊乱。
Have you studied the composition of the chemicals? 你研究过这种药品的成分了吗?
These substances are sometimes combined with other chemicals, such as chlorine. 这些物质有时可与其他化学品化合，例如氯。
Such chemicals taken up by plants can be harmful to humans and animals. 这种化学物质被植物吸收上来,就可能对人畜产生危害.
Conventional dyes are commonly synthetic and originate from petroleum, a non - renewable resource. 传统的合成和染料通常来自石油, 不可再生的资源.

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