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单词 only if
释义 ˈonly if(rather formal) used to state the only situation in which sth can happen 只有Only if a teacher has given permission is a student allowed to leave the room. 学生只有得到老师的许可才能离开教室。Only if the red light comes on is there any danger to employees. 只有红灯闪亮时才有危及职工的险情。
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更新时间:2025/8/22 23:17:10