Only one hint can be active at a time, and sync instructions, among other things, clear out any active hint.
一次只能有一个提示是活动的，与其他情况一样，sync指令会清除任何活动提示。
Active-shutter glasses flicker on and off 60 times per second in sync with the image being displayed on the screen.
主动式快门眼镜闪烁和关闭同步每秒60倍的图像被显示在屏幕上。
Active-shutter glasses flicker on and off 60 times per second in sync with the image being displayed on the screen.
主动式快门眼镜闪烁和关闭同步每秒60倍的图像被显示在屏幕上。
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