v.保持( retain的第三人称单数 )；拦住；保存；止住 双语释义：v.(动词)vt. 保持; 保留 keep; continue to have or holdvt. 挡住 keep in place英英释义： retainv.hold within"This soil retains water"; "I retain this drug for a long time"allow to remain in a place or position"She retains a lawyer"同义词：