?? 詞語組成解析
[醫(yī)] 水龍骨屬
??? 情景例句
He tried to smile.
他設(shè)法要微笑。
Drop dead
暈倒
But even the mosquito has been subdued by attention to drainage and by chemical sprays.
然而即使蚊子，也由于我們注意清理污水和噴灑化學(xué)藥品而被制服了。