He spent many hours in deep contemplation.

他花了多专心思考。

A ferry crosses the river every hour.

渡船每过河一次。

The steamer makes 20 knots an hour.

这艘轮船速是20海里。

She can do 3000 keystrokes an hour.

她在一内能按键3000次。

The train makes 70 kilometres an hour.

这火车速为70公里。

Please set forward your watches an hour.

请把你们表拨快一。

The train is an hour behind time.

火车晚点一。

The final ascent took only half an hour.

最后那次登山只花了半。

The descent of the mountain took two hours.

下山花了两。

It's fully an hour since he left.

他走了至少有一。

It flies at about 900 kilometers an hour.

它以每900公里速度飞行。

You were driving at ninety miles an hour.

Have anything to say for yourself?你当速已达90英里,你有什么要辩解吗?

They spent an hour mooching around the shops.

他们花了一逛商店。

This is his accustomed hour to go to bed.

这是他就寝惯常间。

The descent of the mountain took nearly two hours.

下山差不多花了两。

It took me ten hours to tabulate the results.

我花了十把结果制成表格。

You have a scant hour in which to pack.

你有一来整理行李。

It took me an hour to skim the book.

我费了一把这本书草草地读了一遍。

The recommended dosage is one tablet every four hours.

规定剂量为每四服一片。

The bare narration of the fact took two hours.

单是这事实叙述就花了两。