Difference in time zone, jet lag, lack of morning coffee - are frequently cited reasons as to why you're especially grouchy.

时区的不同、时差、或者没有早茶，这些都是经常会引起你特别不高兴的原因。

youdao

It requires inducing a sort of jet lag without leaving your time zone.

这种训练需要制造一种时差感，不过，你不需要为此穿越时区。

youdao

Jet Lag is not a psychological concequence of having to readjust to a different time zone.

飞行时差反应不是必须重新调整到不同的时区的心理作用。

youdao

Regardless, uber-traveling students say the jet lag and time zone-challenged meetings are all worth it.

WSJ: Traveling the Globe -- Just to Get to Class

He conquers jet lag by refusing to leave his body in any one time-zone long enough for it to adjust.

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