an average的用法和樣例：
例句
- Average one out of ten travelers is killed or robbed by bandits on the road.
平均起來，十名旅行者當中就有一名被路上的強盜打劫殺害。 - A statistician can have his head in an oven and his feet in ice, and he will say that on the average he feels fine.
一個統計學家能把頭在伸進火爐里，腳放在冰里，他會說平均起來他感覺好極了。 - Generally, a book has an introduction.
一般說來，書都有緒論。 - Is this word a countable noun or an uncountable noun?
一般說來，這裡我們用代詞來代名詞。
