Preweld
焊接前, 烧焊前
🗣️ 情景例句
Did the University of Michigan win another football game?
是不是Michigan大学又赢得了一场足球赛？
I'm afraid I don't know. Let me ask the supervisor in this section.
恐怕我不知道，让我来询问一下该组的负责人。
Nothing special.
没什么特别的。