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detain (a child) after normal school hours as a punishment 罚（小学生）课後留校: She was kept in for an hour for talking in class. 她因上课说话被罚留校一小时. keep sth in not express (an emotion); restrain sth 不表露（情感）; 控制某事物: He could scarcely keep in his indignation. 他愤怒得难以自持. keep oneself/sb in sth give or allow oneself/sb a regular supply of sth 使自己[某人]经常有某事物: She earns enough to keep herself and all the family in good clothes. 她的收入能让全家经常有好衣服穿. keep in with sb (infml 口) continue to be friendly with sb, esp in order to gain some advantage 保持与某人亲近（尤指为得到好处）: Have you noticed how he tries to keep in with the boss? 你注意到他多巴结老板了吗?



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