体积互换关系描述的是非固结储水系统的形变量与地下水的超采量之间的体积等量关系。
The volume exchange relation portrays volume equation relations between land deformation and groundwater ultra picks quantity in unconsolidated aquifer-system.
依照美国的成绩计分系统，本科课程平均成绩(GPA)必须在3.00或等量与B或以上。
Undergraduate Cumulative grade Point average (GPA) of 3.00 must be equivalent to "b" average in letter grade or higher, based on the USA grading system.
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