1.ethnic a.种族的；民族的

Along the way, tourists can see the Tujia ethnic minorities tilling the land.
沿着这条路,旅游者可以看到土家族的人在耕地。

2.appeal n.恳求；呼吁；上诉

Their appeal for help went unheeded.
他们求助的呼吁未受到注意。

3.population n.人口；居民

What is the population of this country?
这个国家的人口是多少？

4.census n.人口普查；户口普查

The census is taken one time every four years in our country.
我国每四年一次人口普查。

5.consumer n.消费者；用户；消费品

We need more feedback from the consumer in order to improve our goods.
我们需要从消费者那里多得到些反馈信息以提高产品质量。