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You can get animals addicted to a harmful substance, you can dissect their brains, but you throw their own feces back at them and suddenly you're unprofessional.
你可以让动物对有害物质上瘾，可以解剖它们的大脑，但你向它们扔它们自己的排泄物，就突然之间"不专业"了。
《The Big Bang Theory Season 6》《生活大爆炸 第六季》
双语例句
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The utility model provides a gas mask for operating personnel who works with harmful substance.
本实用新型提供了一种用于从事有害物质作业人员的防毒面罩。
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Some companies have taken measures to prevent women from touching harmful substance to protect unborn babies.
有些公司已采取了措施，不让妇女从事可能接触有害物质的工作，以便保护未出生的孩子。
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In the manufacturing process of industry, the exhaust gas contain some harmful substance such as soot, sulfide, nitration, oil, and so on.
工业生产排出的废气中含有大量的烟尘、硫化物、硝化物、油类等有害物质。
近义词
hazardous materialhazardous substances