driving current的用法和样例：
例句
- An ambient field aids the magnetization from the exciting current.
背景场加强了激励电流的磁化强度。 - The curve of the relation between the amplitude of the ultrasonic wave and the excitation current of the electromagnetic field was obtained by experiments.
为此设计了确定最佳磁化强的试验方案，通过试验得到超声波幅值随电磁场激励电流的变化曲线。
