这家餐厅的在线预订系统会实时显示座位的可预订情况。

The restaurant's online booking system shows the ___availability of seats in real time.

请先确认我的时间安排，再决定会议日期。

Please check my ___availability before setting the meeting date.

我们服务器的可用性达到了99.95%，保证了用户的顺畅访问。

Our server's ___availability reaches 99.95%, ensuring smooth access for users.