单词not、number 及其相关的习语、例句和对话分析。0lesson3~4
1. not n.不,没有
believe it or not 信不信由你
a:is that math course really as hard as everybody says?
a:数学课真像大家说得那么难吗?
b:worse,believe it or not.
b:比那还糟，信不信由你。
2. number n.1.数,数字2.号码 v.编号，总计,达……之数
a number of 一些(后接可数名词，常用large,great等修饰number，表达数量之多)
frequently she meets a number of friends in the supermarket.
她经常能在超市遇到一些朋友。
