自最后一帧改变的屏幕位置。

The screen position change since the last frame.

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以秒计算，完成最后一帧的时间（只读）。

The time in seconds it took to complete the last frame (Read Only).

youdao

以秒计算，完成最后一帧的时间（只读）。

The time in seconds it took to complete the last frame (Read Only).

youdao