分为四个不同的类群: 苏铁类 、 银杏类 、 松柏类、买麻藤类植物以及一些化石类群.There are four widely different living groups: the cycads , ginkgo, conifers , gnetophytes, and several fossil groups....
他收录自世界各地的合唱音乐集取名为《声音》。His collection of choral music from around the world is called "Voices".围在钢琴边来个合唱怎么样？How about a nice sing-along around the piano?他们合唱时嗓音非常和谐.Their voices blend marvellously as they sing in chorus....