segment call的用法和样例：
例句
- The application code that is invoked through that extensibility point is attempting to call back into managed code.
通过该扩展性点调用的应用程序代码正在尝试回调入托管代码。 - To graph the numbers, you'll call in a charting applet that will let you print out your report nice and pretty, all without leaving your browser.
为用图形表示这些数字，你可以调入作图表的小应用程序，让你漂漂亮亮地打印出报表来，而所有这些不必离开浏览器。
