"Yes, Mum," replied Cheryl as she slowly put away her doll.“是的，妈妈。”谢里尔一边慢慢地收起布娃娃一边回答。He had a vision of Cheryl, slumped on a plastic chair in the waiting-room.他想象谢里尔瘫坐在候诊室的一把塑料椅子上。It could have landed anywhere, but it ch...
科学家们正试图将天文学中的各派观点整合在一起。Scientists are trying to pull together disparate ideas in astronomy.总的说来，航空企业很好地促进了天文学的发展。Speaking generally, the space enterprise has served astronomy well.我们很快就将迎来天文学的新纪元。We are on the threshold ...