未及

1. there's not enough time (to do sth.); it's too late (to do sth.)

♦ 他匆促起程, ~向朋友告别。 He set out in such a haste that he didn't have time to say good-bye to his friends.

2. not touch upon; leave unmentioned

♦ 他只谈到了奏鸣曲的结构, 而~于它的起源。 He only talked about the structure of the sonata without mentioning its origin.