extemporarily

例句：

1. 1. He decided to leavethe party immediately after dinner.
   他决定晚饭后立即离开聚会。
2. 2. She was so excitedthat she forgot her manners and spokeimpulsively.
   她太兴奋了，以至于忘了礼貌，脱口而出。
3. 3.The artist sketched the scene in aninstant of inspiration.
   这位艺术家在灵感的一瞬间画下了这幅场景。