The flight will take four hours.

此次飞行将需要四个小时。

《柯林斯英汉双解大词典》

He's already been gone four hours!

他已离开4个小时了！

《柯林斯英汉双解大词典》

She only sleeps for four hours a night.

她每天晚上只睡四个小时。

《牛津词典》

Now,airlines will have to check the no-fly list within two hours of being told of additions, instead of twenty-four hours.

VOA: special.2010.05.08

When I was commuting between Limoges and Paris, that was still a long trip then, there was no TGV; it was about four hours.

如果我在里摩日和巴黎之间通勤,这依旧是段漫长的旅途,这儿没有法国高铁,大概要用四小时

耶鲁公开课 - 1871年后的法国课程节选

We practice six days a week, usually, you know, three to four hours a day,

通常我们每周练习六天，你知道，每天三到四个小时，

赛艇项目很流行 - SpeakingMax英语口语达人

Res.6, the FCC Internet and Broadband Resolution of Disapproval, for up to four hours of debate.

FORBES: Lawless Net Neutrality vs. the "Resolution of Disapproval"

The one-dayer also bowled Bryant, who reached 69 after a slow-rolling four hours at the crease.

BBC: England seamers halt run charge

Roughly two hundred sixty miles and four hours of driving separate the two schools.

FORBES: How The City Of Fort Myers Is Exploiting Florida Gulf Coast's NCAA Tournament Success