所有的恒星都会发出光和热.All the stars send out light and heat.这样的天体本身也可能发出光, 但是它的重力最后还是会把光吸引回去.Light itself could leave from such an object, but gravity would eventually pull it back again.脉冲星是一种能够发出光脉冲的天体.A pulsar is a celestial o...
Away she went, then, glad to escape the surveillance of the odious bully, Captain Bragg.于是她走了, 她很高兴, 因为从此可以摆脱那个又凶又讨厌的布拉格船长的监视.I'm so glad that we've found you at last!...我们终于找到你了，我真是太高兴了！I am so glad that you ...
Theage - metallicity relation AMR provides useful clues about the Galactic formation and evolution.年龄--金属丰度关系给出了银河系形成和演化的线索.Galactic surveys show that distant galaxies are not as evenly distributed in space as theory pre...
Everyone has doubts about their readiness for parenthood.自己是否作好了为人父母的准备，人人都会感到疑虑。a romanticized picture of parenthood一幅理想化的为人父母的情景The book takes a humorous look at parenthood.这本书以幽默的笔触论述了父母的身份....
Nous n'allons pas voyager à cause de mauvais temps.111由于天气不好,我们不去旅行了.Nous sommes de grands amis.我们是好朋友.Enl è ve ton manteau que nous causions plus à l'aise.脱掉大衣,我们可更自在地聊聊.Allon - nous , nous forcer à nous d é p...