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Quinine is an effectual preventive for malaria.是什么意思？

Quinine is an effectual preventive for malaria.

奎宁是有效的疟疾预防药.

相关词汇
quinine is an effectual preventive for malaria

quinine

n. 奎宁，金鸡纳碱；

is

vt.& vi. 是（be的三单形式；n. 存在；

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；

effectual

adj. 奏效的，收效的，行之有效；

preventive

--

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

malaria

n. <医>疟疾，瘴气，瘴疠，痁；
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