Although a little lidocaine would be nice.

不过来卡因倒是不错。

It isn't a better numbing agent, but it does bind a different family of proteins better than lidocaine does: taste receptors.

它不是一种更有效的麻醉剂，但它确实含有一组不同但比卡因更好的蛋白家族：味感受器。

Since lidocaine is incredibly useful, the drug researchers were trying to see if they could find something similar that worked even better.

既然卡因超级有用，药品研究人员就想试一试能否找到比它更有效的类似物质。

Medications like lidocaine or Xylocaine, which you typically get at the dentist or for some minor procedures, basically block the opening of voltage-gated sodium ions, which means that you can't really have those action potentials spread.

卡因或昔洛卡因这样的药物，通常会在牙医那里或一些小手术中使用到，基本上阻止了电压门控钠离子的开放，这意味着你无法让动作电位扩散。