Passengers will pay two hundred thousand dollars to ride to outer space and back for two and a half hours.

VOA: special.2009.12.18

So I could do that in probably two and a half hours.

我可以用大约两个半小时的时间走完这段路程。

旧金山的公共交通 - SpeakingMax英语口语达人

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

Studies have shown that over time, most humans need eight to eight and a half hours of sleep for the best health.

VOA: special.2009.08.26

But recent findings suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.09.22

But recent findings have suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.08.12

To get the most from your exercise plan, experts say adults should get at least two and a half hours of aerobic exercise each week.

VOA: special.2010.06.08

He read for more than two and a half hours.

VOA: special.2009.05.14

On average, each adolescent reported using some kind of media five and one-half hours a day.

VOA: special.2009.03.10

Media use totaled an average of five and one-half hours a day.

VOA: special.2009.02.11