winnow

筛选、精选、挑选常与 down 连用

The committee winnowed the list down to three finalists.

委员会把名单筛选到只剩三位决选者。

剔除、淘汰、去除常与 out 连用

Good editors can winnow out weak arguments very quickly.

优秀的编辑能很快剔除薄弱的论点。

簸、扬谷

Farmers still winnow the rice by hand in that village.

那个村子里的农民仍用手工簸米。

扬谷、簸谷少用

The harvest ends with a careful winnow of the grain.

收成的最后一步是仔细扬谷。