And the back of the hand served by the radial nerve.

手背由桡神经支配。

But the runner-up was the stethoscope's surface, which gathered more microbes than the palms or the backs of the hands.

而其次是听诊器的表面，上面的细菌等微生物可比手掌和手背等要多的多。

Back of the hands as well.

手背也一样。

I find myself wondering how old he was.The veins on the back of the hand are very prominent.And, above all, wondering how he broke his little finger.Was it perhaps in battle?

我发现自己在揣测他的年纪—他手背上的血管非常突出—而我最想了解的还是他的小指为何折断。是在战场上受的伤吗？

Deafblind people communicate through tactile signing also known as hand-over-hand signing, so the deafblind person holds onto the back of the hand of the signer and receives the signs into their palm directly.

聋哑人通过触觉手语进行交流，也被称为手拉手手语，所以聋哑人抓住手语者的手背，直接把手势放在他们的手掌上。