莫莉已经努力克服了对飞行的恐惧。Molly had fought and overcome her fear of flying.载人宇宙飞行的前景看上去充满了越来越多的变数。The future for manned space flight is looking increasingly uncertain.蝙蝠是唯一的有翅膀且能持续飞行的哺乳动物.Bats are the only mammals to have wings an...
漆布(人造皮): 装订用布料,经砑光的染色胶料棉布.Leather - cloth: Cloth for bookbinding. A plasticated cotton that dyed - through and calendered.不, 它是人造皮.No, It's artificial leather.那是人造皮制造的,不够柔软和耐用.They are not as soft and durable....