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黑火药 [hēi huǒ yào]
[军][化工] black powder
miner's powder
miner's powder
- 底部起到推进作用的黑火药负责将烟花壳送入空中。
The black lift powder at the base catapults the shell into the air. - 作为制造黑火药的关键成分，正是硝酸钾推动子弹飞出枪膛，而且这样一来还改变了战争的面貌。
As the key ingredient in gunpowder, potassium nitrate allowed humans to propel bullets from guns and, in doing so, changed the face of warfare. - 狗的主人被事先告知每个房间里面可能发现最多三次的有时候用红纸做标记的大麻和黑火药的迹象，红纸明显地放在那里没啥子目标物的气味等线索。
The dog handlers were told they might encounter the scent of pot or gunpowder up to three times per room, sometimes marked with red paper. It was a flat-out lie—there were no target scents.
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中国词汇量第二的英语词典
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