如何使用 "unavailable" 造句

1. Why is an option or command unavailable ?: 选项或命令不可用的原因？

2. The product provides true application and infrastructure modularity unavailable in other product stacks .: 该产品可提供在别的产品线上无法实现的应用和基础模块。

3. Proxy server is unavailable . Try connecting to proxy xx again ?: proxy服务器无效。尝试重新连接到代理xx吗？

4. The online recruitment testing system is temporarily unavailable due to scheduled maintenance work .: 由于日常系统的维护，目前的招聘测试系统暂时不能使用。

5. A spokesman for bain was unavailable for comment tuesday .: 记者周二无法联系到贝恩资本的发言人置评。