这是一个能对道具提供两个固定点、且能固定于世界的预制组件。 例如：你可以创建一把长刀，这把长刀可以被握在右手，或者挂在腰间，同时长刀也支持被固定于世界上充当摄影道具。 又或者：你可以创建一个眼镜，眼镜可以被拿在右手，或者被戴在脸上，同时眼镜也可以被放置到世界中充当摄影道具。 占用3/256变量空间。 仅支持Write Defaults ON模式的Avatar动画器。 EN: This is a prefab component that provides two fixed points for props and can be fixed in the world. For example, you can create a long sword that can be held in the right hand or hung on the waist, while also being able to be fixed in the world as a photography prop. Or, you can create a pair of glasses that can be held in the right hand or worn on the face, and can also be placed in the world as a photography prop. Occupies 3/256 variable space. Only supports Avatar animators in Write Defaults ON mode.