手肘

1.Researchers can precisely measure previously unquantifiable aspects of pitching—everything from the angular velocity of the arm at the shoulder joint to tension on the knees and elbows.

研究者可以精确地测量出先前无法量化的各种有球方面的数据——从肩节部位手臂移动角度的度，到膝盖和手肘的张力。