sieve n. 1.(细眼)筛。 2.(约装一 bushel 的)粗筐。 3.〔比喻〕嘴松的人,守不住秘密的人,嘴不严的人。 a head [memory] like a sieve 记性糟透了。 draw water with a sieve=pour water into a sieve 白费气力,徒劳。 as leaky as a sieve 嘴松,容易泄漏秘密。 vt. 筛,筛选。
A sieve analysis (or gradation test) is a practice or procedure used (commonly used in civil engineering) to assess the particle size distribution (also called gradation) of a granular material.