例句與造句

1. The electrometer must be capable of measuring the very small output current which is in the region of femtoamperes to picoamperes, depending on the chamber design, radiation dose and applied voltage.
2. These instruments are capable to feed constant currents in the ranges from few picoamperes ( pA ) to several amperes ( A ); typical construction for use in the lower range of feed currents uses operational amplifiers.
3. It's difficult to find picoamperes in a sentence. 用picoamperes造句挺難的