园丁定期从花园里剔除长势弱的植物。

The gardener regularly ___culls the weak plants from the garden.

编辑从投稿中精选了一些优秀文章发表。

The editor ___culled some outstanding articles from the submissions for publication.

农场主不得不宰杀一些羊羔以控制羊群数量。

The farmer had to ___cull some lambs to control the flock size.