他即席创作了一首足球队胜利之歌.He improvised a song about the football team's victory.她的自白简直等于一篇即席说明.Her confession was simply tantamount to a casual explanation.她即席做了这些评价.She had made these remarks offhandedly....

“即席”的拼音为：jí xí...

“即席”的英语可以翻译为：impromptu，extemporaneous，take one's seat ，extempore ...