And the team says changes in time spent in light or dark environments influences eating habits.

VOA: special.2010.12.21

We're in between absolute day and absolute night, light and dark.

我们处在绝对的日与绝对的夜之间，光与暗。

耶鲁公开课 - 弥尔顿课程节选

And every night, late at night, I turned the lock of his door and opened it C oh,so gently! And then, when I had made an opening big enough for my head, I put in a dark lantern, all closed that no light shone out, and then I stuck in my head.

VOA: special.2009.05.16