基本解释[化學]弧之觸發英汉例句雙語例句Before striking an arc, the welder frequently taps the end of the electrode on the ground to break away flux at the tip.在引人注目的一個弧形，水龍頭的銲工經常年底電極地麪上打破通量的小費。striking of an arc更多例句专业释义化學弧之觸發