The drug's lack of availability presents a serious problem for them.这种药现在很难买到，这给他们造成了一个大麻烦。

She's the perfect candidate for the job, but I need to confirm her availability. [=I need to make sure she is available]她是这份工作的最佳人选，但我需要确认她是否能来。

The availability of affordable housing attracted us to this town.价格适中的住房把我们吸引到了这个小镇来。