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trace SLIGHT AMOUNTtreIsn [C]a very slight amount微量，少许After he died, traces of drugs were found in his blood.他死后，在他的血液中发现了少许麻醉药品。Traces of dangerous chemicals have been found in the river.在河里发现了少量危险的化学药品。There is just a trace of grey in his hair.他的头发里夹杂着少许灰白的头发。She speaks English without the slightest trace of an accent.她说英语丝毫不带口音。There was the faintest trace of a smile on her lips.她的嘴边带着一抹极淡的微笑。His face showed no trace of emotion as the judge passed sentence on him.当法官向他宣判的时候他的脸上没有一丝表情。"How wonderful!" she said, without any trace of sarcasm. “多美妙！”她说，不带丝毫讽刺挖苦的意味。A trace element is a simple chemical substance that is necessary for healthy growth and development, and which exists in animals and plants in small amounts. There are various types of trace element.微量元素Seaweed is a good source of minerals and trace elements.海藻里含有丰富的矿物质和微量元素。
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