sift [sɪft]

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vt. 筛选；撒；过滤；详查 vi. 筛；详查；撒下；细究

to put flour , sugar , etc . through a sieve (= wire net shaped like a bowl ) to break up large pieces

Sift out the wheat from the chaff. 把小麦的壳筛出来。
Sift sugar on top of the cake. 在蛋糕上面撒上糖。