It simply creates a SOAP envelope with an empty body.

它只是简单地创建了一个SOAP信封，而没有包括任何消息体。

youdao

Server examines the ETag and determines that the page hasn't changed since last time the client requested it, so sends back a response of 304 (Not Modified) with an empty body.

服务器检查该ETag，并判断出该页面自上次客户端请求之后还未被修改，直接返回响应304(未修改——Not Modified)和一个空的响应体。

youdao

Right now it's got that second key word there called pass, which is just Python's way of saying there's an empty body in here.

现在我在完善它的一个简单部分,但是首先，类是用来干什么的呢？,把类认为是可以创建一个。

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