What is clear is that receptors in the eye react to the visible blue part of the light, to work in such a way with the distribution of the sleep hormone melatonin.

很清楚的是，眼睛内的受体对可以察觉的蓝光部分会有所反应，以这样一种方式与所分布的睡眠褪黑激素起作用。

youdao

Use your bedroom only for sleep – clear your bedroom of distractions such as computers, phones and other "sleep stealers" in order to create a positive sleep association with the bedroom.

将卧室仅用来睡觉——将一切会打搅睡眠的东西清理出你的卧室，比如电脑、电话和其他的偷窃睡眠的小玩意儿。

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But Rice is signaling impatience with a lack of action on such promises, and is making clear her intention to press the matter at the Kuwait conference.

但是，赖斯国务卿则对这个许诺之后不见行动的作法表示不耐烦，她明确表示要在科威特会议上在这个事情上施压。

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And Italian premier Mario Monti said he believed the British people would choose to remain within the union when presented with such a "clear-cut question".

BBC: Nick Clegg says Cameron's EU goal 'wholly implausible'

And he's going to be joining us, and it's - it'll be very interesting working with somebody whose got such a clear voice as a musician.

NPR: Serenading Science In A New Rock Album

"The presidency is an independent office and the Irish people whom I appreciate so much and I take with such responsibility have given a very clear mandate on a very clear set of ideas to me, as the ninth president, " he said.

BBC: Irish presidential election: Michael D Higgins elected