VOA慢速英语:Light Color Affects Mood

1. The animals were separated into 4 groups.

separate into 分成（若干部分）
例句：The personnel be separate into part-timer and full-time staff.
全体职员分为兼职和专职两类。

2. "What we saw is these animals didn't show any sleep disruptions at all but they did have mucked up circadian clock genes and they did show depressive phenotypes whereas if they were in the dim red light, they did not."

mucke up 弄脏
例句：No need to muck up my seats!
不必弄脏我的座椅！

3. Mr Nelson has suggestions for people who work late at night, or those who like to stay up late.
 
stay up 不睡觉； 熬夜
例句：I can barely stay up to a normal adult hour, as it is.
我几乎不能像正常成年人那样熬夜。

4. My recommendation is if you are just living a typical mostly active [life] during the day, mostly inactive at night, you want to limit exposure to TVs which are quite bluish in the light they give off and computer screens and things like that.

give off 发出； 放出； 散发出
例句：When bacteria stagnate, they multiply and give off toxins and stinky odors.
当细菌停滞时，它们会繁殖并释放毒素和臭气。