如果设置为 false，导入器就会尽可能不对曲线重新采样。
有关详细信息，请参阅 animation curve resampling。
注意：
- 一些不受支持的 FBX 功能（例如变换组件上的 PreRotation 或 PostRotation）将重载此设置。在这种情况下，即使禁用了此设置，还是会对动画曲线重新采样。为获得最佳效果，请避免使用 PreRotation、PostRotation、和 GetRotationPivot。
- 版本 5.3 中已引入此选项。在这之前的版本中，Unity 的导入行为会以此选项始终处于启用状态为前提。因此，如果启用此选项，导入行为会与 5.3 版之前的动画导入行为相同。
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