invoked block

例句：

1. 1. The server has been invoked to process the request.
   服务器已被调用来处理请求。
2. 2. This program is designed to invoke blocks of code when needed.
   这个程序设计成在需要时调用代码块。
3. 3. The developer used a invoked block to optimize the performance of the application.
   开发者使用了被调用块来优化应用程序的性能。