英语词组,渴望,怀念（为.难过）,叹口气,对.好(behave)

desire to / yearn for 渴望
miss 怀念
sigh for 为...叹气
sorry for 为.难过
act on/upon 对.起作用
这个问题值得自习课上讨论
This issue is deserved to discuss in our class.
This issue is worth discussing in our class.
This issue is worthy of discussing in our class.
This issue is worthwhile to discuss in our class.
This issue is worth our while to discuss in our class.