非导函数
This non sequitur invalidates his argument. 他不根据前提推理因而论证无效。
Patience is a sine qua non for a good teacher. 做个优秀教师必不可少的条件是要有耐心。
The diplomat was declared persona non grata. 这位外交家被宣布为不受欢迎的使节。
He is declared personal non grata and forced to leave the country. 他被宣布为不受欢迎的人而被迫离开该国。
An organic derivative, such as coal or petroleum. 有机衍生物一种有机衍生物，如煤或石油
I had had a few beers and was completely non compos mentis. 我喝了些啤酒就头昏脑胀了。
