earth square是什么意思

用法例句

Based on the experience which had been achieved in investigating the present land utilization in Langfang city,HeBei Province,the article provides new methods to measure and calculate the quadrilateral lands.

土地面积量算工作是土地利用现状调查的重要组成部分 ,是取得土地数量资料的关键步骤 本文根据在对廊坊市土地利用现状调查的工作中取得的经验 ,提出利用新的方法对四边形宗地面积进行量