例句與造句

1. The etched section also reveals that multiple weld passes were made over the top of the original submerged arc weld pass .
   從酸蝕斷面還可以看出：在原自動埋弧焊的上面覆蓋有多層焊道。
2. It's difficult to find multiple welding in a sentence. 用multiple welding造句挺難的