服务实现的基本消息头为正确执行定义类，导入所需的库。

The basic headers of the service implementatation define the class and import the required libraries for proper execution.

youdao

当创建活动时，必须选择一个连接，活动才能成功地连接到外部系统并执行定义的活动操作。

When an activity is created, a connection must be selected so that the activity can successfully connect to the external system and perform the defined activity operations.

youdao

如果在为该服务调用定义的超时长度内没有收到任何响应，则中介流可以执行定义的重试调用。

If no response is received within the timeout period defined for the service invocation, the mediation flow can perform defined retry invocations.

youdao

So now, henceforth, when you say, to declare a function, I am declaring a function here but down here am I quote unquote defining it or implementing it.

从此以后，当你说，声明一个函数，我在这里声明了一个函数,但是到这里我定义它或执行它。

哈佛公开课 - 计算机科学课程节选

It takes an int; deal with it when you get to it and then once you look through the whole file, should you find -- ultimately find the actual code that defines or impliments this thing.

它携带一个int数，当你获得了它就处理它,然后一旦你查看整个文件，最终你将发现实际代码中,定义或执行了这个东西。

哈佛公开课 - 计算机科学课程节选