基本解释[化学]弧之触发英汉例句双语例句Before striking an arc, the welder frequently taps the end of the electrode on the ground to break away flux at the tip.在引人注目的一个弧形，水龙头的焊工经常年底电极地面上打破通量的小费。striking of an arc更多例句专业释义化学弧之触发