... toxic and harmful substance 有毒 ; 有毒有害物质 non-toxic substance 无毒物质 highly toxic substance 剧毒物质 ...
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... extremely late 极晚 extremely toxic substance 剧毒物质 extremely feeble 极度虚弱 ...
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... 剧毒物质 acutely toxic substance 有毒物质 toxic substance 致突变性物质 mutagenic substance ...
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汽车尾气中的四乙基铅是剧毒物质。
Automobile exhaust tetraethyl lead is a highly toxic substance.
二恶英是一种剧毒物质，应当更好地加以控制。
Dioxin is a kind of extremely toxic matter and should be kept under better control.
遗憾的是，有少量剧毒物质已经对人体造成了严重副作用。
‘The problem is that there are a few highly toxic things that unfortunately have had very severe effects on people.’
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