adj.不可逆的；不反轉的；不可轉換的；不能互換的

This non sequitur invalidates his argument. 他不根據(jù)前提推理因而論證無效。

Patience is a sine qua non for a good teacher. 做個優(yōu)秀教師必不可少的條件是要有耐心。

The diplomat was declared persona non grata. 這位外交家被宣布為不受歡迎的使節(jié)。

An order or command reversing another one. 收回成命的命令與另一個相反的定貨或命令

He is declared personal non grata and forced to leave the country. 他被宣布為不受歡迎的人而被迫離開該國。

non reversing 不可逆的(不反轉的