New Words：

million [ˈmɪljən] num. 一百万；大量
billion [ˈbɪljən] num. 十亿

Sample Sentences：

Last year we sold over one million mirrors.
There were millions of people in the square.
What would you do if you won a million pounds?

A billion is a large number.
There are 1.4 billion people in China.

square [skwer] n. 平方；正方形；四方形；正方形物；广场

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