This changes in 3.8 as many enhancements have been made in this area, based on user input.
这点在3.8中发生了变化，因为该领域根据用户输入进行了许多改进。
Now add a Box widget to contain the input area for the user.
现在，添加一个包含用户输入区的Box小部件。
A rectangular area of the screen that may respond to user input events.
屏幕的一个矩形区域，能响应用户的输入事件。
A window is a rectangular area on the screen that receives user input and displays output in the form of text and graphics.
窗口是屏幕上接受用户输入和以文本和图形方式显示输出的一块矩形区域。
The circle radius of the user input or square edge length, the area is calculated and displayed.
说明：对用户输入圆半径或正方形边长，计算并显示其面积。
The circle radius of the user input or square edge length, the area is calculated and displayed.
说明：对用户输入圆半径或正方形边长，计算并显示其面积。
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