If he doesn't stop till then, he shall have been playing the piano for over 4 hours.

如果到那个时候他还不停止，他就弹了4个小时的钢琴了。

youdao

The operation, which lasted for over 4 hours, proved to be very difficult because of the hard resin which covered the skin.

手术持续了4个多小时，非常难做，因为皮肤上覆盖着一层硬硬的树脂。

youdao

Of course I take two hours to go home for lunch. And we begin classes at 2:30the school is over at 4:55.

当然，我需要两个小时的时间回家吃午饭。我们班2时30分开始，学校是在4：55才放学的。A。

youdao

Almagro was on court for just under two hours in his 6-2 6-2 6-4 win over Melzer while world No.5 Ferrer demolished Haider-Maurer 6-1 6-3 6-1 to continue his unbeaten status in Davis Cup singles matches.

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