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extemporize的现在进行时为：extemporizing...
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extemporize的音标：extemporize的英式发音音标为：[ɪk'stempəraɪz]extemporize的美式发音音标为：[ɪk'stɛmpəˌraɪz]...
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He had to extemporize because he had forgotten to bring his notes.他因为忘了带讲稿,只好即席发言....
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extemporize的一般过去时为：extemporized...
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extemporize的现在完成时为：extemporized...
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extemporize的第三人称单数（三单）为：extemporizes...