principal compressive stress的用法和樣例：
例句
- The principal compressional stress axis obtaind through focal mechanism solutions show NNE and NW orientations.
由震源機制解求出的主壓應力軸為北北東向和北西向。 - According to focal mechanism,the directions of main press stress of the two are NNW in the seismic area but the fault plane solutions are different.
震區的主壓應力為北北西方向，兩震的受力方向基本一致，但斷層面解明顯不同。
