我得去方便一下。

I need to take a biobreak.

《牛津词典》

我到树林子里去方便一下。

I am going to hit the woods.

youdao

对不起先生，我得去方便一下，就一会儿。

Sorry, Sir, I must answer the call of nature-i won't be long.

youdao

对不起先生，我得去方便一下，就一会儿。

Sorry, Sir, I must answer the call of nature-i won't be long.

youdao