本集语言点：要不是……，……。.If it weren't for the fact that ..., ,,,。 例如：要不是方言太难，我早就学会唱蝴蝶歌了。If it weren't for the fact that the dialect was so difficult, I would have learned to sing the Butterfly Song long ago. 瑶族人民不但能歌，而且善舞。长鼓舞被他们视为最重要的舞蹈。可别小瞧了长鼓舞，它的作用可不小呢！每逢当地丰收、节庆、祭祀，婚嫁的日子里都少不了它。今天俙西有个小愿望，就是想向孟天证明自己是一个能歌善舞的姑娘。她能否成功呢？