这就是视力反馈系统的目的。改进视力的长度，达到最佳效果。

That is the goal of the visual feedback system, refining the length of the eye to attain maximum efficiency.

youdao

这就是视力反馈系统的目的。改进视力的长度，达到最佳效果。

That is the goal of the visual feedback system, refining the length of the eye to attain maximum efficiency.

youdao