An output followed by an input is a solicit-response operation, and a single input is a notification.

输出后面紧跟着输入则是请求-响应(solicit - response)操作，单一的输入是一个通告。

youdao

As defined in Web Services Description Language (WSDL) grammar, a solicit-response operation contains input and output elements, with output first and then input, as shown in Listing 1.

如web服务描述语言(Web Services Description Language, WSDL)语法所定义的，要求-响应操作包含输入和输出元素，首先输出，然后输入，如清单1中所示。

youdao

I sincerely write to solicit your co-operation and trust in an urgent business transaction.

我真诚地写，征求您的合作和信任的一项紧迫商业交易。

youdao