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.
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。
An instrument other than a watch for measuring or indicating time, especially a mechanical or electronic device having a numbered dial and moving hands or a digital display.
仪表，钟：除了时钟以外的测量或指示时间用的仪器，尤指一种有数字表盘、移动指针或数字显示的机械或电子仪器。
Members of the public closely watch levels of PM2.5, particles measuring 2.5 microns across that are easily inhaled and damage lung tissue.
公众成员密切关注PM2.5的水平，2.5微米左右颗粒物很容易吸入并损伤肺部组织。
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