The observational work is carried out on a range of telescopes.观测工作借助于各种望远镜。We have experimental and observational evidence concerning things which happened before and after the origin of life.有关生命起源前后发生了什么，我们通过实验和观察得出了一...
石蕊: 从几种地衣类植物中获取的带色有机化合物的混合物.Litmus: Mixture of coloured organic compounds obtained from several species of lichens.地衣类植物生长速度慢,有好几年的寿命.其生长依赖于霉菌和海藻的共生.Lichens, which grow slowly and live for many years, result from fungi a...
She went to New York to receive the award in person.她亲自前往纽约领奖。She'd made the right choice in leaving New York.她离开纽约的决定是正确的。He had jumped overboard in New York harbor and swum to shore.他在纽约港跳下船，游上了岸。...