It took him much longer—hundreds of extra hours to improve his skills.

他花了更长的时间——数百个小时来提高他的技能。

youdao

Li and his workmates need to work extra hours to take care of the animals from March until mid-May.

从3月到5月中旬，李和他的同事需要加班来照顾这些动物。

youdao

Nothing feels worse than hearing your alarm clock ring in the morning when your body is screaming for a few extra hours of rest.

没有什么比早上听到你的闹钟响更糟糕的了，因为你的身体在嚷着要多休息几个小时。

youdao

They are very aggressive to be type-A people who just simply made two extra hours out of their 24-hour day.

他们渴望成为上等人,甚至希望每天,能多过两个小时。

麻省理工公开课 - 媒体、教育、市场课程节选

All your TA's have either already have their extra office hours, or there are some that will be going on tonight or tomorrow, so keep those in mind as your finishing up your studying for the exam.

你们的助教们有的已经做过额外的答疑，而有的会在今天晚上或者明天答疑，因此在你复习准备,考试的时候不要忘了这些。

麻省理工公开课 - 化学原理课程节选

Besides, going without children allows you two-career couples to put in extra hours at work.

FORBES: Magazine Article

Many raised concerns about staffing levels, with most respondents saying they were working extra hours.

BBC: Poor morale and job cuts threaten NHS reform, says RCN

This makes it easier to persuade them to put in extra hours or shoulder new tasks.

ECONOMIST: How much longer can America keep increasing productivity?