He only had some ammeter and an ampoule.

他只有些培计瓿（针剂）。

Finally, we saw how to measure voltage and current in a real circuit using voltmeters and ammeters.

最后，我们了解了如何使用电压表电流表测量实际电路中的电压电流。

This is known as an ammeter, and it measures the current in Amperes by connecting in series with the circuit.

这电流表，通过与电路串联来测量培电流。

Attaching the ammeter, a device with near-zero resistance, in parallel with another resistor, will cause nearly all the current to run through the ammeter, possibly damaging it.

将电流表（种电阻接近零的设备）与另电阻器并联将允许几乎所有电流流过电流表，可能导致损坏。