The drive train users two differentials, with one to produce forward and reverse motion and the other to produce a difference in speed between the two sides.

传动装置有两个差速器，一个用于产生向前和向后的运动，另一个在两侧形成速度差。

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Its two high-speed electric motors operate as one but can act independently (and incidentally, by using reverse torque instead of friction for braking, the motors convert the energy of your motion to help replenish the battery).

FORBES: A Standing Ovation