Eng

Had mastered...

掌握了

Grasp, Grasped, Grasping, Grasps, Had grasped, Had mastered, Has grasped, Have grasped, Have mastered, Master, Mastered, Mastering, Masters, To grasp, To have, To master

(Attain, Attained, Attaining, Attains, Get to, Gets to, Getting to, Got to, To attain, To get to, To hold)

掌握了

Grasp, Grasped, Grasping, Grasps, Had grasped, Had mastered, Has grasped, Have grasped, Have mastered, Master, Mastered, Mastering, Masters, To grasp, To have, To master

(Attain, Attained, Attaining, Attains, Get to, Gets to, Getting to, Got to, To attain, To get to, To hold)