经理无法置评。

The manager was ___unavailable for comment.

此外，年轻一代的榜样可能是著名网球运动员乔·希尔，但他不幸无法接受采访。

Furthermore, a role-model for the younger generation could be the famous tennis player Joe Hill, who unfortunately is ___unavailable to give an interview.

抱歉，史密斯医生今天下午因有约在先而无法会面。

I'm sorry, but Dr. Smith is ___unavailable this afternoon due to a prior engagement.