很多雄鸟进化出鲜艳的羽毛是为了吸引雌鸟。The bright plumage of many male birds has evolved to attract females.人类的进化the evolution of the human species陆栖动物据信由海栖动物进化而来.Land animals are believed to have developed from sea animals....
He looked affectionately at his niece.他慈爱地看着他的侄女。My niece was left in my trust for the weekend.我受托周末照顾我的外甥女.He adopts his niece as his heiress.他指定他的侄女为继承人....