while [waɪl]

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conj.当…的时候；而；虽然；尽管 n.一会儿

during the time that, or at the same time as

In a short while, the cat ate up the fish. 不久，那只猫便将鱼吃个精光。
He teaches English in the school all the while. 他一直在这所学校里教英语。