As Yum grew up, at ages 7 and 8, he had to practise for four hours a day.

随着任的成长，年仅7、8岁，他就不得不每天练习4个小时。

youdao

I enjoyed playing the violin very much, and I didn't mind practicing, sometimes three or four hours a day.

我非常喜欢拉小提琴，我不介意练习，有时一天练三四个小时。

youdao

Do I need to be available twenty four hours a day?

我真的需要每天24小时随叫随到吗？

youdao

But he points out that technology has also made new music available to people all over the world twenty-four hours a day.

VOA: special.2010.07.19

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

"There is no way we can monitor the activities of each juror twenty-four hours a day.

VOA: special.2009.08.31

Alwaleed says he reads at least four hours a day and watches CNN religiously.

FORBES: The optimist

Americans spend an average of four hours a day watching TV, an hour of that enduring ads.

FORBES: ZAP!

It took the in-house gem-setter three to four hours a day for several days to complete the pattern.

FORBES: Writing Instruments As Objets D��Art