在这项研究中,研究人员让志愿者在不同时间于屏幕上阅读、玩游戏和看电影,同时监测他们的眼睛接收到的光线。
In the study, the researchers let volunteers read, play games and watch movies on a screen for different time while measuring how much light their eyes received.
假设有一个灯泡和五个可以在不同时间和不同地点打开它的开关。
Imagine there are one bulb and five switches to turn it on at different times in different places.
岩石的颜色非常奇妙,在一天的不同时间里,它们会从紫色变成红色。
The colors of the rock are fantastic, and at different times of the day, they change from purple to red.
Or sometimes they might have men one day, women another time, and mixed at other times.
有时一天男子用,一天女子用,其余时间同用。
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