Delaying the start of the school day by just half an hour could improve the sleep patterns of teenagers, as well as reducing drowsiness during the day, lifting their mood and cutting depression.

只要延后上学开始的时间半个小时就可能改善青少年的睡眠模式，同时还降低白天的困倦、提升他们的情绪、减少忧郁。

youdao

But as revealed by the listings above, from the day the television was purchased, the same programmes were often shown twice a day - proving that frequent repeats are not a recent invention.

但是通过节目单可以看出，电视机买到之日起，就经常有同一个节目一天之内播放两次。看来电视里经常重复播放节目是早已有之，不是后来的发明。

youdao

It is with the strength of these emotions, as well as the concrete, glass and steel that is brought in day by day, that we will build on the footprints of the past the foundation of the future.

正是因为这些情感的力量，以及一天天堆积起来的混凝土、玻璃和钢筋，我们在过去的脚印上重新出发，为未来铺平道路。

youdao

A "tornado outbreak" is often defined as six or more tornadoes produced by the same weather system within a day.

VOA: special.2010.05.11

Aluminum and magnesium are both made by ionic liquid electrolysis, just as I showed you last day.

铝和镁都是,由离子液体电解而成，就像我昨天讲的。

麻省理工公开课 - 固态化学导论课程节选

It established,by law, the fourth Thursday in November as Thanksgiving Day.

VOA: special.2009.11.23

The brutality of the Assad regime becomes ever more apparent each day -- as each day goes by.

WHITEHOUSE: Press Briefing

Israel should send clear messages to Hamas leaders: they cannot tour the world as diplomats by day and behave like terrorists by night.

BBC: Gaza attacks divide media

We are reviewing it on a day-by-day basis and as soon as we can open it up we will.

BBC: East Surrey Hospital visitor restrictions continue