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重点讲解：
1. come over 顺便来访；
例句：You really must come over sometime and have dinner with us.
你确实应该找个时间来串个门，跟我们一起吃顿饭。
2. wear out (使)磨损；(使)用坏；
例句：He wore out his shoes wandering around Mexico City.
他在墨西哥城到处游荡，磨坏了鞋子。
3. be crazy out 热衷的；狂热的；
例句：He's crazy about novels.
他看小说看上瘾了。
4. take out 取出；拿出；
例句：Take out a pen and paper right now and start writing your letter to your future self.
现在就拿出笔和纸，开始给未来的自己写封信吧。
n. 弓
n. 鞠躬，蝴蝶结，船头
