keep down

控制，压制，镇压；压低，放低（声音）

KB, KBE, KC, kebab, kedgeree, keel, keen, keenly, keenness, keep, keep (radio) tuned for, keep (sb/sth) away (from sb/sth), keep a promise, keep an eye on, keep at, keep away, keep back, keep clear of, keep company with, keep doing sth., keep early hours, keep faith, keep friends with, keep from, keep from doing, keep house, keep in mind, keep in touch, keep in touch with, keep off, keep on, keep on good terms, keep one's balance, keep one's eyes open, keep one's head, keep one's mind on, keep one's temper, keep one's word, keep oneself/sb from sth/doing sth, keep out,