碌碌无为的英文：
be busy for nothing

参考例句：

The consensus in the office is that he's useless at his job.
办公室成员一致认为他在工作中碌碌无为。

busy是什么意思：
adj. 忙碌的；忙于···；人来车往的；占线的；纷繁的
v. 忙着做某事
n. 侦探，包打听

Be engaged in; be Busy in
从事于

to sit for business
因公滞留

As Busy as a bee
(象蜜蜂)忙忙碌碌的

Monkey Business
耍些骗人的把戏、捣鬼

depressed business
不景气的生意

nothing是什么意思：
pron. 没有什么，无关紧要
n. 不关紧要之事

Sow nothing; reap nothing
不播种,无收获

There is nothing to be ashamed of
没有什么见不得人的事

They lacked for nothing.
他们什么都不缺少。

Nothing for nothing and very little for a half penny
一分钱,一分货

He who refuses nothing will soon have nothing to refuse.
对什么都不拒绝的人很快会没有东西可拒绝