Perchlorether
[化] 全氯乙醚
🗣️ 情景例句
Five, five, five, seven, five, three, two.
5557532。
Sorry, I don't.
对不起，我没有。
But even the mosquito has been subdued by attention to drainage and by chemical sprays.
然而即使蚊子，也由于我们注意清理污水和喷洒化学药品而被制服了。