Ject对"impromptu" 的正确翻译：adj. 即席的, 即兴的；adv. 即兴的(地), 无准备的(地)。发音：[im'prɔmptju:;im'prɔmptju:,im'prɔmptu:]。例句参考：An impromptu visit broke up the long afternoon. - 突然的造访打破了漫长的午后时光；It usually take me more than three weeks to prepare a good impromptu speech. - 为了准备一则即席的好讲辞, 我通常要三个星期以上。；