Second... Newton's Second Law: ma this is the only force in the x direction.

根据牛顿第二定理：,等于。，ma，equals。。。,这是x方向的,唯一一个力。

youdao

Zheng S. -M. , Wang S. -Q. , Ma J. , Kong L. -N. , Sun X. -M. , Li S. Mental status of myocardial infarction patients undergoing autologous bone marrow stem cell transplantation.

郑淑梅，王霜秋，马静，孔令娜，孙雪梅，李双自体骨髓干细胞移植治疗心肌梗死患者心理状态调查分析。

youdao

Antitheticly, the NW striking faults are smaller and commonly wrench faults to cut the NE striking faults (ma X y, 1989).

北西向断裂规模较小，一般为一些横截北东向断裂的扭性断裂(马杏垣，1989)。

youdao