I heard that some tours actually go down into the canyon. Is that true?
我聽說有的旅游團真正下到峽谷里去了。那是真的嗎?
There is no general rule without some exception.
普遍規律必有例外。
is as the proportion of the total vocabulary of his mother tongue against those words of his own baby talk that are taken up into the vernacular of his family.