韦氏词典上it的特殊用法

used as a direct object with little or no meaning 用作直接宾语，几乎不具或完全不具有任何含义

We hoofed it all the way back to camp. [=we walked all the way back to camp] 我们一路快走赶回营地。

We decided to rough it on vacation this year. [=to have our vacation somewhere where we would not have our normal comforts]今年我们决定去一个条件艰苦的地方度假。

living it up [=doing exciting and enjoyable things; spending money freely while enjoying life] 尽情享受生活

She offered to come with me, but I decided to go it alone.[=to go by myself; to go alone]她提出来要跟我一起，但我决定自己去。

（以上内容全部摘自2017年1月第1版《韦氏高阶英汉双解词典》）

(待续)