Les
abbr. 發射脫離系統（Launch Escape System）
??? 情景例句
It's about moving to Los Angeles.
是關于搬家到Los Angeles的事。
No,that's not my book.
不，那不是我的書。
I spent the whole day in my room, but I did not write a single card!
我在房間里關了整整一天。然而竟連一張明信片也沒寫成！