They waited for about two hours.

他们等了大约两个钟头。

《柯林斯英汉双解大词典》

Voting began about two hours ago.

投票开始于约两个小时前。

《柯林斯英汉双解大词典》

The journey was reckoned to take about two hours.

路上估计要花大约两个小时。

《牛津词典》

It is mixed for about two hours with some common chemicals and then allowed to cool.

VOA: special.2011.07.25

And if you are prepared to stand up for about two and a half to three hours to watch a play,

而且你要准备好了站上大约两个半小时到三个小时，去看一场戏剧，

莎士比亚环球剧院 - SpeakingMax英语口语达人

The older kind of submarine used in World War Two could stay under water for only about forty-eight hours.

VOA: special.2010.06.11

He ran for about two hours, always heading downhill, until he entered a mountain valley.

WSJ: Escape From a North Korean Prison

She and her husband both work full time, though her workday is about two hours longer.

FORBES: Time

Schwartz said Clinton was up and walking about two hours after the surgery.

CNN: Bill Clinton, fresh out of hospital, eager to go back to work