火药残留物

gunpowder residue的用法和样例：

例句

The procedure produced an oily residue composed of hundreds of complex organic molecules.这个过程制造出一种油性的残留物，包括几百种复杂的有机分子。
In general, an inorganic residue is much more detrimental to the operation of the waveguide.一般，无机残留物对波导使用的危害要大得多。

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