核心问题
请解释 buy of 与 buy off 的区别。
词典解答
buy of (介词) 表示“从……购买”：
I bought this car of John. 我从约翰手里买下了这部汽车。
buy off(副词)表示“收买”“向……行贿”：
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If you're trying to buy me off, I'm afraid you've come to the wrong person. (ODCIE) 你要是企图收买我，恐怕你是找错人啦。
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His sister threatened to tell the police, so he had to buy her off. (LDPV) 他的妹妹威胁说，要去告诉警察，所以他只好用钱把妹妹收买了。