You use heaven-sent to describe something such as an opportunity which is unexpected, but which is very welcome because it occurs at just the right time.
例句
It will be a heaven-sent opportunity to prove himself.这将是他证明自己的天赐良机。
英英词典释义
Adjective
1. peculiarly fortunate or appropriate; as if by divine intervention;
"a heaven-sent rain saved the crops""a providential recovery"