动态 刚体类型定义了 2D 刚体的固定行为。可以是动态（刚体在模拟下移动并受重力等力的影响）、运动学（刚体在模拟下移动，但不受重力等力的影响）或静态（刚体在模拟下不移动）。更多信息
参见 术语表 是 Rigidbody允许游戏对象受模拟重力和其它力的影响的组件。更多信息
参见 术语表 2D 的默认刚体类型，因为它是需要移动的事物的最常见的刚体类型，并且设计为在模拟下移动。所有 Rigidbody 2D 属性在此刚体类型下可用，例如有限质量和阻力，并且受重力和力的影响。动态刚体将与所有其他刚体类型发生碰撞，并且是刚体类型中最具交互性的。它也是性能开销最大的刚体类型，因为它具有动态特性并与周围的一切交互。
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