Not long ago, researches learned that four-day olds could understand addition and subtraction.

不久前，研究人员发现4天大的婴儿能够理解加减法。

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Asked how long they had watched the financial news on television each day in the past week, 74% said at least one hour and 15% said four hours or more.

在问到过去一周里他们每天在电视上收看多长时间的财经新闻时，有74%的人回答至少1小时，15%的人回答4小时或更长。

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But it had been a long commute - a day and a half, four flights and a boat ride - so I grabbed a book and headed for a canopy just off a beach that belonged to only us.

但是往返路程很漫长——一天半，要搭乘四次飞机和一次船——因此，我带上一本书开赴属于我们的海滩之外的那片苍穹。

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The annual four-day event at Long Marston Airfield had been scheduled to begin on 8 August.

BBC: Biker at the festival

He and his family had just sat down to break the day-long Ramadan fast when four gunmen entered their Mosul home.

UNESCO: MEDIA SERVICES

Of course, the Super Bowl is four hours long while an MLG event spans 10-12 hours a day for the course of a weekend.

FORBES: MLG Touts Engagement and Ad Reach for eSports After Dallas Event