1·He often interchanges his black hat with his grey hat.
他经常将他的黑帽子与他的灰帽子交换着戴。
2·To optimize the navigation for the end user, minimize the number of request and response interchanges between the set-top box and the portal.
要优化最终用户的导航，请尽可能减少机顶盒与门户间的请求和响应交换的数量。
3·In Ajax applications, browser-to-server interactions come down to only application-specific data interchanges, which results in optimizing server resources to more users and more applications.
在Ajax应用程序中，浏览器和服务器之间的交互仅仅是为了交换与应用程序相关的数据，这会优化服务器资源的使用，让服务器资源能够支持更多的用户和更多的应用程序。