If you say that something unexpected is manna from heaven, you mean that it is good and happened just at the time that it was needed.
例句
Ex-forces personnel could be the manna from heaven employers are seeking...当过兵的人大概是雇主们寻找的宝贝了。The revealed documents were manna for journalists.这些披露出的文件让记者们如获至宝。
英英词典释义
Noun
1. hardened sugary exudation of various trees
2. (Old Testament) food that God gave the Israelites during the Exodus