driving current的用法和樣例：
例句
- An ambient field aids the magnetization from the exciting current.
背景場加強了激勵電流的磁化強度。 - The curve of the relation between the amplitude of the ultrasonic wave and the excitation current of the electromagnetic field was obtained by experiments.
為此設計了確定最佳磁化強的試驗方案，通過試驗得到超聲波幅值隨電磁場激勵電流的變化曲線。
