Gmac
abbr. gaining major air-command 獲得（或授予）主要的空軍指揮權
??? 情景例句
I never slept.
我總睡不著。
My brain doesn't seem to be working well today.
我的頭腦今天好像不太靈光。
How would you go to Beijing, by air or by train?
你怎樣去北京，是乘飛機還是坐火車？