plough on

• • 继续犁地：

    If they plough on until it’s dark,they would get this field finished.

    如果他们继续犁地到天黑，他们就可以把这块地犁完。

  • 坚定不移地前进；坚持下去：

    We ploughed on no matter how difficult it was.

    不管多么困难我们仍要坚持下去。