The man needs an English dictionary when he works.

These kind of books are rare.

这类书不多见.

What kinds of books are you looking for?

你在找哪类书?

Editor-in-Chief : What kind do you read?

总编: 你一般读哪一类书?

What types of books do you generally read?

你通常涉猎哪类书?

This bookstore doesn't handle medical books.

这家书店不经销医学类书藉.

Such a book should be praised, not banned.

此类书应该得到赞扬, 而不应被禁止.

Such books are little read nowadays.

这类书现在很少有人读了.

It's enough just to browse through a book like this.

这类书只需涉猎就行了.

They'll be trash, because that's all she reads.

都是些无聊的东西, 因为她就看这类书.

Such books are generally anchored well on the theory and practical sides.

这类书一般对理论与实践两方面都同样侧重.

One can't help him , no matter how one tries.

无论人们怎样努力,都无济于事.

He tried without success to dismiss her / her memory from his thoughts.

他尽量不去想她,然而无济于事.

No matter how we alter the microscope, we cannot improve matters.

无论我们怎样改动显微镜都无济于事.

I tried to explain it to the psychiatrist, but without much success.

我竭力向精神病学家解释, 但是无济于事.

He spent all his life in dropping buckets into empty wells.

他一生都是把水桶投入空井,做了些徒劳无益的事情.

However, in the past, these attempts were usually futile.

但是, 在过去, 这些尝试通常徒劳无益.

The most futile thing in this world is any attempt, perhaps, at exact definition of character.

世界上最徒劳无益的事情, 也许就是企图给性格下个正确的定义.

It had been useless to run, as the nearest cover was far beyond reach.

这时要逃也徒劳无益了, 离得最近的藏身处也远不可及.

It's useless arguing / to argue with them.

跟他们争论是徒劳无益的.

His analysis of political order had immediate , real-world applications.

他对政治秩序的分析有着立竿见影的现实应用.