To test if your attachments are working at runtime, echo the attachments passed in as input in the output, which can be done through a mediation flow component.

为了测试附件是否在运行时正常工作，在输出中将附件作为输入传递，这可以通过中介流组件完成。

youdao

To test the new connection, try typing some text into the client, press Return, and watch the server echo that text.

为了测试新连接，试着向客户机输入一些文本，按return键，并观察服务器是否回显文本。

youdao

When we use it to test the underwater target strength, one problem is how to discriminate the direct sound of the source with the echo reflected from the target, finding the target character quickly.

当利用它进行水下目标强度测试时，一个很实际的问题就是怎样区分声源直达声和目标反射回声，快速找出目标特性。

youdao

Despite efforts to build an industrial park on the surrounding site, the tower has no purpose, except as a tourist spot an odd place to propose to your sweetie (it's happened), and a place to test the seemingly endless echo.

NPR: Power Structures Shape Northwest Landscape