| 1. | The child 's work at school is about average ..
这孩子学习成绩中常。 |
| 2. | The average age of the boys here is ten .
这些孩子的平均年龄是十岁。 |
| 3. | This statement is true only on the average .
这种说法只是大体上正确。 |
| 4. | It could be counted an average day .
这一天可以算是平平常常的一天。 |
| 5. | A cow's estrus cycle averages 21 days .
母牛的发情周期平均为21天。 |
| 6. | An average of ten students are absent each day .
平均每天有十名学生缺席。 |
| 7. | The rainfall averages 36 inches a year .
年降雨量平均为36英寸。 |
| 8. | I have done some averaging to reach these figures .
我平均以后得出这些数。 |
| 9. | They are reverting toward the average .
他们正向平均水平后退。 |
| 10. | The average of 3, 7, 9 and 13 is 8 .
3，7，9和13的平均数为8。 |
