He spent many hours in deep contemplation.

他花了多个小时专心思考。

The descent of the mountain took two hours.

下山花了两个小时。

The descent of the mountain took nearly two hours.

下山差不多花了两个小时。

It took me ten hours to tabulate the results.

我花了十个小时把结果制成表格。

The recommended dosage is one tablet every four hours.

规定剂量为每四小时服一片。

The bare narration of the fact took two hours.

单是这事实的叙述就花了两小时。

The earth rotates on its axis once every 24 hours.

地球每24小时依其轴心自转一次。

The operation to implant the artificial heart took two hours.

人工心脏植入手术花费了两小时。

She found knitting a comfortable employment in her idle hours.

她发现编织毛衣是悠闲时间消遣的好方式。

The huge clock of the Customs House strikes the hours.

海关的大钟每小时都报时。

It took many hours to convince the court of his guilt.

花费了许多个小时法庭才相信他有罪。

The storage time of probational liquid must not exceed 2 hours.

供试液贮存时间不得超过2小时。

He spent two hours tying all the parcels with string.

他花了两个小时用绳捆扎所有这些包裹。

Here is your medicine - the dose is two spoonfuls every four hours.

这是你的药，剂量是每四小时服两匙。

The police subjected him to an inquisition that lasted two hours.

警察对他进行了持续两小时的盘问。

Her stint as a lifeguard usually consumes three hours a day.

救生员这项工作每天通常花费她三个小时。

Arguing about details consumed many hours of the committee's valuable time.

争论细节问题耗费了委员会数小时宝贵的时间。

I lay awake through the wee small hours,waiting for the signal.

我躺到后半夜没睡,等候信号。

It took the firemen nearly two hours to put the blaze out.

消防队员花了近两个小时才把大火扑灭。

The opera will last five hours if you take no tucks in scores.

如果你不大刀阔斧地删节的话, 那歌剧将演五小时。