average selective information

例句：

1. 1. The students are of average intelligence.
   学生们的平均智力一般。
2. 2. The food at this restaurant is quite average.
   这家餐厅的食物相当普通。
3. 3.The average temperature in winter is around 5°C.
   冬季的平均温度大约是5°C。