actual family size是什么意思，词典释义与在线翻译：
actual family size的用法和样例：
- The average family size has decreased from 4.84 members in 1971 to 3.63 members in 1998.
- The major reason for the reduction of family size is a reduction in the number of births.
- The net result of those conflicting trends is to cause optimum family size to be greater for low than for high heritability.
- Rainwater, I.Family Design: Marital Sexuality, Family Size, and Contraception[J].Chicago.Illinois: Aldine.
- Linhe There are 162,000 households, the average family size of 2.99 people households.