datum point

• 参考点

datum point的用法和样例：

例句

1. The level at the reference point is zero.
   参考点的电平是零。
2. The point about which moments are computed need not lie on the rod.
   计算力矩的参考点，并不一定要在杆上。
3. The paper introduces examination methods of ground datum points.
   介绍了平面基准点的检验方法。