1) They were mining for silver.
他们开采银矿。
2) They are mining for coal.
他们在开采煤矿。
3) They marched off .
他们离开。
4) They marched away .
他们开走。
5) They were mining for gold.
他们在采金。
6) They were mining for coal .
他们在采煤。
补充资料：他们
1.代词。称自己和对方以外的若干人。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条