声明你要访问为public，或者创建get方法的变量

Declare the variables you want to access as public, or create get methods.

有关公共变量，你会怎么做：

For public variables you would do:

public Vector2 Position;

和访问它，你会叫：

Ball ball;
ball.Position

有关get方法实现：

public Vector2 getPosition()
{
    return Position;
}

和你会调用该方法得到的位置。

And you would call that method to get the position.