nanoamp造句

Thus, a measured current of one nanoamp ( 10 " 9 A ) corresponds to about 6 billion ions striking the faraday cup each second.
But when you open up an ion channel to let the membrane reach equilibrium, you're talking a very tiny amount of current that flows ( I don't know an actual value offhand, but my guess is it's down in the nanoamp range ).
It's difficult to see nanoamp in a sentence. 用nanoamp造句挺难的