approximate numerical measures

例句：

1. 1.The price is approximately $100.
   这个价格大约是100美元。
2. 2. The distance between the two cities is approximately 50 miles.
   这两个城市之间的距离大约是50英里。
3. 3.The estimate of the population is approximately 10 million.
   估计的人口数大约是1000万。