So they took the data they gathered from national censuses and surveys, and projected it forwardbased on what they knew about population growth in each country.
所以他们收集了来自国民人口统计和调查的数据，并根据他们对各个国家人口增长情况的了解做进一步的研究。
2
A method that measuring angular displacement error, identifying parameters of error model and compensating error automatically was put forwardbased on inductosyn angular measuring system.
针对感应同步器测角系统，提出了一种自动检测测角误差、辨识误差模型系数和补偿误差的方法。
3
Some datum, for example safety factor and allowable stress are put forwardbased on production practice.