coal·face
noun/ˈkəʊlfeɪs/
/ˈkəʊlfeɪs/
(also face)
Idioms - the place deep inside a mine where the coal is cut out of the rock
（煤矿井里的）回采工作面，采煤工作面 - The miners had to crawl to reach the coalface.
矿工们必须爬行才能到达采煤工作面。
- The miners had to crawl to reach the coalface.
Idioms
at the coalface
- (British English) where the real work is done, not just where people talk about it
在工作现场；在工作第一线 - Many of the best ideas come from doctors at the coalface.
许多最好的意见都来自临床医师。
- Many of the best ideas come from doctors at the coalface.