1.keep an eye on 留意
He had been sent here to keep an eye on Benedict.
他被派到這兒監視貝內迪克特 。
2.touch off 引發;觸發
Some slight incident may touch off a major war.
一件小事可以觸發一場大戰 。
3.used to 曾經
I feel more compassion and less anger than I used to.
我覺得自己比過去多了些同情,少了些怒氣 。
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