that is

That is an ironclad fact that is beyond controversy.

这是铁的事实，无庸置辩。

She maintains that the accusation is groundless.

她持该指控是毫无根据的。

She often complains that he is dishonest.

她常埋怨说他不诚实。

That is by far the best choice.

那是最好的选择。

A fat lot of use that is!

那已是一点点没有了！

A fat lot of good that is!

那已是一点点好没有了！

That is manifest to all of us.

那对们家来说是显而易见的。

Her yawn suggests that she is sleepy.

她打哈欠表示她很困了。

I strongly believe that he is innocent.

他是无辜的。

But that is now an untimely subject.

但那是一个现在不合时宜的题目。

It is obvious that he is wrong.

显然他错了。

We hold that their proposal is unfounded.

们认为他们的建议是无事实根据的。

That is a nice suite of furniture.

那套家具很不错。

I reckon that he is old enough.

认为他的年龄已经够了。

That is the house which I built.

那是建的房子。

That is the present direction of government thinking.

这就是政府考虑问题的趋向。

That is not so bad, considering (the circumstances).

照（实情）说， 那还算不错(从多方面说来， 还过得去)。

It's evident that the plan is impracticable.

很明显这计划是不能实现的。

Are you aware that there is a difficulty?

你知道有困难吗?

It is logical that the book is expensive.

书贵是很自然的事。