I was told that the gravitational method is the most inexpensive method among the geophysical prospecting.

我听说在所有的地球物理勘探方法中，重力法是最为经济的一种方法。

youdao

I was told that the gravitational method is the most inexpensive method among the geophysical prospecting.

我听说在所有的地球物理勘探方法中，重力法是最为经济的一种方法。

youdao