可可电台，每期节目一话题，让英语磨练耳朵的同时学到更多有益的小知识，丰富知识的同时受益于生活。

必须戒掉的坏习惯

Keeping your phone next to your bed

手机放床头

Another key to getting better sleep is not letting outside influencers impair your sleep.

睡个好觉的另一个关键因素是别受外在事物影响。

The LED screens of our smartphones, tablets, and laptops, for example, give off what is called blue light, which studies have shown can damage vision and suppress production of melatonin, a hormone that helps regulate the sleep cycle.

比如智能手机、平板、和笔记本电脑的显示屏会发出蓝光，研究显示蓝光损害视力，抑制褪黑激素的生成。褪黑激素有助于调节睡眠周期。

Research also suggests that people with lower melatonin levels are more prone to be depressed.

研究人员还表示，体内褪黑激素水平低的人更容易抑郁。

【知识点讲解】

suppress vt. 镇压；隐瞒；压制；止住；禁止

例句：

The revolt was suppressed in a matter of hours.

叛乱在几小时之内就镇压下去了。

All these movements were suppressed by the warlord government.

所有这些运动都受到军阀政府的镇压。

A common person would not suppress his real name.

一个平常人是不会隐瞒他的真实姓名的。

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