这个主界面显示您自己和您跟踪的那些用户的状态消息，其中有一个用于发布新消息的文本框。

This main screen shows status messages, both your own and those of users that you track, and has a box for posting new messages.

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选中选项框以使用主密码。

Check the box to use a master password.

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在循环完成后，另一套画布、密码文本框和Submit按钮将被创建并封装到t k主窗口中。

After the loop, another canvas, password text box, and Submit button are created and packed into the Tk main window.

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