英语语法分析

A positive Brudzinski's sign occurs when flexion of the neck causes involuntary flexion of the knee and hip.

当脖子的弯曲导致膝盖和臀部的不自主弯曲时，这是布鲁金斯氏征的阳性标志。

We can replace this by plaster with the arm in flexion .

我们可以用石膏来替代它，把上臂固定于屈曲位。

Theleft knee continues to upkick with large knee flexion.

左膝继续通过大幅度的弯曲上踢。