1. In this edition of American Living, we are looking at some population trends in the USA. (P18) 在这一版的《美国生活》中，我们讨论美国人口趋向。
1). trend
noun [C]
1 a general development or change in a situation or in the way that people are behaving:趋势；
There's been a downward/upward trend in sales in the last few years.
