新托福阅读机经背景知识

Songbirds include those birds from the order Passeriformes, commonly called passerines. There are approximately 5,400 different species of passerines. The suborder Oscine includes those birds that we tend to think of as your typical songbird, those birds that have complex songs as adults. In the majority of Oscines, the male is the one with the complex singing ability, and there is much diversity among males of different species in the length and complexity of their songs.

托福考试如何突破高分？托福名师一对一免费为你指导！点击展开对话>>>免费咨询热线400-618-0272

Song needs to be developed, just like any other characteristic of songbird behavior. Singing the correct song for that species is not an instinctual process. The need to sing is instinctual, however what song to sing has been found to be learned. When and where young songbirds learn their songs has long been studied. Just as songbirds differ in their songs, they also differ in their song learning process, though some basic principles seem to be the same. Many species learn their song only during the first few months, though a few can learn songs their entire lives. Also differing between species is from who the songs are learned, and how much of the songs are accurately imitated.

托福考试如何突破高分？托福名师一对一免费为你指导！点击展开对话>>>免费咨询热线400-618-0272

Some species may exactly copy the songs they are exposed to. On the other hand, many will not exactly imitate the song or songs that they have been exposed to. Instead they will take bits and pieces of it and invent their own song, though usually similar in construction to that which the species normally sings.

名师提示，对于托福培训一定要选择正规机构，以免由于师资力量薄弱、教学系统不规范以及其他服务不周等原因，耽误你宝贵时间及造成不必要的损失。免费咨询热线400-618-0272。

推荐阅读〉〉〉