jet lag
noun [ U ] uk/ˈdʒet ˌlæɡ/ us/ˈdʒet ˌlæɡ/
时差反应
the feeling of tiredness and confusion that people experience after making a long journey by plane to a place where the time is different from the place they left
Every time I fly to the States, I get really bad jet lag. 每次我乘飞机去美国，总是深受时差反应之苦。