week.Thatisonehourbetween8p.m.and9p.m.onFriday,SaturdayandSundaymostweeks. LiZhanguohastwochildrenaged4and8.Eventhoughtheydonothavesmartphones,they enjoyplayingonlinegames.Likemanyotherparents,Liishappywithnewgovernmentrules.But expertssayitisunclearifsuchpoliciescanhelppreventaddictiontoonlinegames.Childrenmi...
In the chemical reactor there's a vacuum very close to that of interstellar space. And the temperature is minus 200° Celsius.在化学反应堆中有一个非常接近星际空间的真空空间。温度是- 200摄氏度。We made the ice, we can see a bit here, a sort of growth on the edge of the window. The ...
What precisely triggered off yesterday's riot is still unclear... 究竟是什么引发了昨天的骚乱还不清楚。 柯林斯高阶英语词典 What I wanted, more than anything, was a few days' rest... 我最想要的就是能休息几天。 柯林斯高阶英语词典 She had been in what doctors described as an irreversible ve...
The discovery, outside our Solar System, of giant planets similar to Jupiter but much closer to their star, posed a serious puzzle for astronomers, because giant planets of that kind cannot form in such zones. Planets form in a disc of gas and dust that surrounds the young star.在我们的...
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It is crucial to realize that an "observatory" is more than simply a telescope or ensemble of telescopes that provide observing opportunities for astronomers. Observatories are at the heart of an institutional capability to do things beyond what is possible for astronomers themselves to do as ...
What is not mentioned (提及) in the article [A] I like drinking champagne. [B] Everyone tried to help me open the bottle. [C] The champagne showered everyone.
Astrophysics is a branch of space science that applies the laws of physics and chemistry to seek to understand the universe and our place in it.
A planetary nebula is a phenomenon that occurs when a small to medium star approaches the end of its life cycle. The first one was...
If it weren’t for physicists, the modern world would be a very different place. The study of physics underlies many pivotal discoveries of the 20th century – including the laser, television, radio, computer technology, and nuclear weapons– and has played a vital role in the development of...