to go through a substance or an area of something with difficulty

We ploughed through the mud. 我们费力地穿过泥泞的地方。

to finish reading, eating, or dealing with something with difficulty

I've got an enormous pile of papers to plough through. 我有成堆的文件要看。

You'll never manage to plough through all that food. 你不可能把那些东西都吃完。