And for those of us who fly more than a couple of time zones from home-particularly those who fly eastward around the globe-jet lag can be a serious challenge.
对于经常从家中出发，飞越时区的我们来说——尤其是那些飞往地球东方的人——时差综合症可能成为很严重的挑战。
There are 15 million of us who fly across multiple time zones every year, with 500, 000 of us in the air at any given moment.
每年都有1500万人乘坐飞机跨越不同时区，甚至每时每刻都有50万人在天上。
There are three such zones in the us-east region at this time: us-east-1a, us-east-1b, and us-east-1c.
此时，在 us-east 地区有 3 个这样的区域：us-east-1a、us-east-1b 和 us-east-1c。
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