7 milliamps, for as little as 3 seconds, to be exact.

7毫安，准确地说，只有3秒。

And 100 milliamps can stop a heart.

而 100 毫安可以使心脏停止。

What we have here is we have two circuit boards, both of them are powered by batteries in the Pelican Cases and they both emit a current of about 20 milliamps.

我们这里有两个电路板，它们都是由电池供电的，它们都发出大约 20 毫安的电流。

The amount of current that’s flowing is measured in amperes, and a current of only 20 milliamps can cause someone to lose control of their diaphragm and stop breathing.

流动的电流量以安培计，仅 20 毫安的电流就会导致人失去对隔膜的控制并停止呼吸。