the fact that something cannot be obtained 无法得到;难以获得 Many of the problems were caused by the unavailability of suitable equipment. 许多问题是由于没有合适的设备造成的。
the fact that somebody is not able or not willing to see, meet or talk to somebody 不能(或不愿)见面;不能(或不愿)交谈 The trial was adjourned due to the unavailability of a key witness. 由于没有关键证人,审判延期了。
opposite availability