mains voltage的用法和樣例：
例句
- This paper presents a novel current source which is insensitive to supply voltage.
摘要這篇論文提出了一個(gè)和電源電壓變動(dòng)無(wú)關(guān)的新式電流源。 - The frequency changer set is adopted to providing test power, which regulates the electric voltage and frequency.
通過(guò)采用變頻機組提供試驗電源，實(shí)現電源電壓與頻率的調節。
