词组 | call on or call upon |
释义 | call on or call uponv.1To make a call upon; visit. 拜访;访问。◆ Mr. Brown called on an old friend while he was in the city.布朗先生在市里时去拜访了一位老朋友。2To ask for help. 要求帮助。◆ He called on a friend to give him money for the bus-fare to this home.他要求一位朋友为他提供回家的长途汽车费。 |
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