如果某人赤手空拳做成了某件事 done something with their bare hands，那就是说他没有借助任何工具或武器就完成了这件事儿。

例句

I didn't have a fishing rod, so I caught the fish with my bare hands.

The policeman was shocked when he realised that the murderer had killed the victim with his bare hands.

请注意

另一个短语 with one hand tied behind your back 或 with both hands tied behind your back 意思是你轻而易举地做成了一件事。

Janette doesn't find the work difficult. She can do most tasks with one hand tied behind her back.