voltage meter的用法和樣例：
例句
- And the excitation voltage and output were also fed through the selector switch to the digital voltmeter.
其激勵電壓和輸出也通過選擇開關接到數字電壓表上。 - Because of the low test current level used, a very sensitive voltmeter is required to measure the voltage drop, which is usually in the microvolt range.
由於所使用的測試電流很低，所以就需要非常靈敏的電壓表來測量這種通常在微伏範圍的電壓降。
