inexplicably
adv. 说不清的；无法说明地；令人难以理解地
例句
She inexplicably withdrew the offer.
她不可思议地撤回了提议。
《牛津词典》
She suddenly and inexplicably announced her retirement.
她突然令人费解地宣布退休。
《柯林斯英汉双解大词典》
Then, inexplicably, he TURNS. Walks away.
然后，他莫名其妙地转身离开。
