hem/hɛm; hem/ n [C] the edge of a piece of clothing that is turned under and stitched down 〔衣服的〕折边，卷边，滚边
hem sb ↔ in to completely surround someone so that they cannot get away 包围: Police gathered around the protesters, hemming them in. 警察聚集在抗议者周围，把他们包围了起来。