adv.無(wú)緣無(wú)故地

She was unaccountably irritated. 她莫名地生氣。

He has been unaccountably delayed. 他被莫名其妙地耽誤了。

Quite unaccountably she burst out crying. 她莫名其妙地哭了起來(lái)。

In the book,a tycoon unaccountably becomes the hero's friend. 在這本書(shū)中，一個(gè)大亨莫名其妙地成為了那位英雄的朋友。

Younger Americans are unaccountably demanding a right to life after work. 但如今這種思想?yún)s遇到了后繼乏人的難題。