抓斗的酒吧滑块用鼠标，观察亮度变化时，令人吃惊的是蓝色的黑光栅移离。
Grab the slider with the mouse and observe the startling change in brightness when the black grating is moved away from the blue bars.
抓斗的酒吧滑块用鼠标，观察亮度变化时，令人吃惊的是蓝色的黑光栅移离。
Grab the slider with the mouse and observe the startling change in brightness when the black grating is moved away from the blue bars.
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