Different versions of the MI-17 helicopter are designed specifically for high-altitude military operations and areinservice in the mountains of Afghanistan.
MI - 17直升机的不同版本专门为高海拔军事作战而设计，并在阿富汗的山区服役。
2
In some instances, this effort is extended to include sending messages through to backend service provider applications to ensure that both frontside and backside links areinservice.
有些情况下，还会将消息发送给后台服务提供者应用程序，以确保前台和后台连接都能够正常使用。
3
As a result, businesses are much more accountable, often in very specific ways, which creates powerful incentives to improve service.