After a long flight that crosses many time zones, your body still thinks it is the old clock. You feel tired at the wrong hour, your head is foggy, and sleep will not land where you want it. That mess is jet lag; a person who has it is jet-lagged.

After a long flight that crosses many time zones搭了一趟跨越很多時區的長途飛機之後 your body still thinks it is the old clock你的身體還以為現在是原本的時間 You feel tired at the wrong hour你會在錯的時間感到疲倦 your head is foggy腦袋昏昏沉沉的 and sleep will not land where you want it想睡覺的時候卻怎麼也睡不著 That mess這種混亂狀態 is jet lag就是jet lag（時差） a person who has it有這種狀況的人 is jet-lagged就是jet-lagged（有時差的）

It is ordinary English, not a doctor's word. Flying east, toward an earlier morning, is often harder than flying west. The feeling can last a day or two, sometimes more.

It is ordinary English這是很普通的英文 not a doctor's word不是醫生的專門用語 Flying east, toward an earlier morning往東飛、朝著更早的早晨飛 is often harder than flying west通常比往西飛更難調適 The feeling這種感覺 can last a day or two可能持續一兩天 sometimes more有時候更久

You can also say you have jet lag or you are suffering from jet lag. Though actually, a short hop that stays in the same time zone does not really give you this — tired from a plane is not the same thing as jet-lagged.

You can also say你也可以說 you have jet lag你have jet lag（有時差） or you are suffering from jet lag或說你are suffering from jet lag（正受時差之苦） Though actually不過其實 a short hop that stays in the same time zone一趟沒有跨時區的短程飛行 does not really give you this其實不太會讓你有這種狀況 tired from a plane is not the same thing as jet-lagged搭飛機搭到累，跟jet-lagged（有時差）不是同一回事