trace residue 痕量残留
There are tiny amounts of uranium residue in coal; those trace residuals have more energy potential than all the coal itself.
煤炭中有微量的铀残留物；而这些微量残留所蕴含的能量比所有的煤炭本身还要多。
Thought here, and my heart too happy to turn over the last few days displeasure to find out, let the wind dry them blown away, until not a trace of residue.
想到这里，心里忙不迭地把连日来的不悦找出翻开，让风把它们吹干吹走，直到一丝也不残留。
The trace pesticide residue methyl-parathion was detected using SERS.
采用SERS的方法检测痕量农药残留甲基对硫磷分子。
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