英语词汇“only if”的释义、用法及例句-英汉例句词典-知否

词汇	only if
例句	Idiom 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。
随便看	be after doing something be after/out for somebody's blood be a game be a go be a good/bad timekeeper be a (good) sport be a good thing (that)… be a (great/firm) believer in something be a great one for (doing) something beak beaked beaker be a law unto yourself be all about somebody/something be (all) downhill be all ears be all eyes be all (fingers and) thumbs be all for something/for doing something be (all) for the best be all go be all in somebody's/the mind be all mouth be all over bar the shouting be all over somebody

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