安培安培是电流单位。
大鼠发电机以毫微微瓦级在运转（1微微安培是1安培的亿万？ 分之一），因此它只是极少量的电流，产生不了多少电力。
The rat generator operates at the femtowatt scale -- a pico-amp is a million millionth of an amp, so it is a tiny amount of current -- so not very much power.
皮安表是安培表的一个门类，其实质上是静电计中安培表功能的延续。
A picoammeter is an ammeter built along the lines of the ammeter function of an electrometer.
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