Tech has a bad (and deserved) reputation as a sleep killer. Blue light, incessant scrolling and information onslaught conspire to keep us on edge and exiled from dreamland. But a few gadgets and apps out there may actually help us sleep. We’ve tried many such products over the years and have gathered the ones that actually did some good in this list. But first, take the arguably most important step towards good sleep: Use the sleep schedule on your phone (Android, iPhone). Once you’ve done that, check out the best sleep gadgets below and prepare to shuffle off to the land of nod.
因此，有必要将性教育作为独立课程纳入中小学课程体系。
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