研究人员表示，每晚至少睡五小时可能会降低五十岁以上人群患多种慢性病的几率。他们说，健康状况不佳会影响睡眠，但睡眠不好本身也可能是疾病的预警或威胁健康的风险。 Experts generally recommend we all get around seven or eight hours' sleep per night for good health. Now new ...

How anthropogenically driven climate change is affecting heat waves and drought is one of the most important environmental issues facing societies around the globe. Zhang et al. present a ...

Vehicle designers not yet considering solar bodywork are crazy. The tipping point is with us mainly because single-crystal silicon photovoltaics providing 50% more electricity per unit area is now ...

表达“tipping point”指的是“事情即将发生重大变化的转折点”，意思是“某种状况或局面从量变到质变时一触即发的临界点”，一旦越过这一时间点，将无法挽回。比如，科学家们会使用这个概念来谈论气象学、社会学和经济学相关的现象。 例句 Many believe ...