In order to spin off the Moon, Earth would have had to rotate so fast that a day would have lasted less than three hours.
为了脱离月球,地球必须旋转得如此之快,以至于一天持续的时间少于三个小时。
It's got to be practical so don't forget to specify things like who would be involved, and the cost, and the order that things would be done in.
它必须是实用的,所以不要忘记指定诸如参与者有谁、成本、完成顺序等事宜。
It is reported that many hospitals abroad refuse all visitors to patients in order to stop the spread of COVID-19. Patients feel lonely and worried, so some hospitals have created "Online Wish Wall" for the public.
据报道,国外很多医院为了阻止新冠肺炎的传播,拒绝对所有患者的探视。病人为此感到孤独担忧,因而一些医院为公众创建了“网上许愿墙”。
"So we need to make changes in order to deal with that particular threat.
VOA: standard.2009.03.24
If we have a higher z effective, it's pulled in tighter, we have to put in more energy in order to eject an electron, so it turns out that that's why case 2 is actually the lowest energy that we need to put in.
而如果有效核电量更高,原子核的束缚也就更紧,我们不得不输入更多的能量来打出一个电子,这就是第二种情况,所需要输入的,能量更少的原因。
So, which has the smallest energy that you have to put in in order to eject this electron?
也就是,哪一项为了打出一个电子,所需要注入的能量最少?
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