sayHello()函数只有一个参数，它会使用println()语句将这个参数输出到控制台。

The sayHello() function takes one parameter, which it outputs to the console in the following println() statement.

youdao

feedinfo是主函数，负责接收url和可选的输出流(类似文件的对象)，默认输出流为系统输出(控制台)。

Feedinfo is the main function, and takes a URL and an optional output stream (file-like object), defaulting to system output (the console).

youdao

feedinfo是主函数，负责接收url和可选的输出流(类似文件的对象)，默认输出流为系统输出(控制台)。

Feedinfo is the main function, and takes a URL and an optional output stream (file-like object), defaulting to system output (the console).

youdao