1. Unable to open the network connection profile. 无法打开网络连接配置文件。
2. We regret that we are unable to accept your proposal since we already have an agent in your area. 很遗憾我们不能接受你的建议，因为我们已经有了一个代理在你申请的区域。
3. However, due to the existence of group restrictions, often be unable to complete the distribution. 但由于弹道分组限制的存在，经常出现无法完成分配的现象。
英英解释
adj.
1. (usually followed by `to') not having the necessary means or skill or know-how
2. (usually followed by `to') lacking necessary physical or mental ability
3. lacking in power or forcefulness
