请求使用POST而非GET打开，而且Content - type头被设置为让服务器预知它能得到何种数据。

The request is opened using POST instead of GET, and the Content-Type header is set to let the server know what sort of data it should expect.

youdao

这三个参数用于在操作系统上打开套接字，如果成功，就意味着协议支持字段被设置为TRUE。

These 3 parameters are used to open a socket on the operating system and if success, it means that the protocol supported field is set to TRUE.

youdao

如果你此时打开“系统偏好设置”，你就会看到你的桌面已经被设置为这些图片的循环了。

If you open up system preferences now, you can see that your desktop is set to cycle through these images.

youdao