If you start the game now with your unit test the ball will move away from the center and go out of the screen, which is not really cool.

如果你现在就运行你的测试，球将会从屏幕中央飞出屏幕，这看起来就不够酷了。

youdao

If you press and hold, the screen will raise or lower fully, so you have full control of how you want the unit to respond.

如果你按住，屏幕将全面提高或降低，所以你有你想要的单位如何响应的完全控制。

youdao

If you press and hold, the screen will raise or lower fully, so you have full control of how you want the unit to respond.

如果你按住，屏幕将全面提高或降低，所以你有你想要的单位如何响应的完全控制。

youdao