that is

That is an ironclad fact that is beyond controversy.

这是铁的事，无庸置辩。

She maintains that the accusation is groundless.

她坚持该指控是毫无根据的。

She often complains that he is dishonest.

她常埋怨说他。

That is by far the best choice.

是最好的选择。

A fat lot of use that is!

已是一点点用处都没有了！

A fat lot of good that is!

已是一点点好处都没有了！

That is manifest to all of us.

对我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.

我坚信他是无辜的。

But that is now an untimely subject.

但是一个现在宜的题目。

It is obvious that he is wrong.

显然他错了。

We hold that their proposal is unfounded.

我们认为他们的建议是无事根据的。

That is a nice suite of furniture.

套家具很错。

I reckon that he is old enough.

我认为他的年龄已经够了。

That is the house which I built.

是我建的房子。

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（情）说， 还算错(从多方面说来， 还过得去)。

It's evident that the plan is impracticable.

很明显这计划是能现的。

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。