The subjects were asked to use their free right hand point with a baton to the location of each knuckle and fingertip of their left hand.
实验对象被要求用他们空出来的右手拿着一根指挥棒，指出他们左手每个指关节和指尖的位置。
The medicine prize went to a physician who, for fifty years, cracked the knuckles on only his left hand to test his mother's contention that knuckle-cracking causes arthritis.
医学奖授给了一位内科医生，他50年来每天不断扳左手手指，以验证自己母亲说扳手指会引发关节炎的话是否正确，他的结论是：妈妈，你错了。
The steering-knuckle ARM, attached to the front wheels, are therefore forced to swing the wheels to the right or left on their pivots.
于是，与前轮相连的转向节臂使车轮在其轴线上左右转动。
The steering-knuckle ARM, attached to the front wheels, are therefore forced to swing the wheels to the right or left on their pivots.
于是，与前轮相连的转向节臂使车轮在其轴线上左右转动。
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