Learning without thinking is of no use.

学而不思则罔。

But it was of no use.

但是，这些都没有起到作用。

All his haste was of no use.

他白忙了。

But the interlayer almost is of no use.

而夹层材料几乎不起作用.

This backtrace appears to be of no use.

此回溯跟踪似乎没有用处。

Reading without understand is of no use.

读书不求甚解，没有什么用处。

We consider it of no use learning theory without practice.

我们认为学习理论而不实践是无用的。

I do not eat bread. Wheat is of no use to me.

我不吃面包，麦子对我来说，一点用也没有。

Tom whooped until he was hoarse, but it was of no use.

汤姆直喊得嗓子都哑了也无济于事.

The life of a lazy man is of no use to himself and to others.

懒人的生活无论是对自己还是对他人都是毫无用处的。