Prewelding
预焊
🗣️ 情景例句
I think I can swing that.
我想我能办到这点。
Flowers make no difference to a room.
一个房间里有没有鲜花并没有很大的差别。
It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.
不久，一架直升飞机飞抵飞机失事现场，来搭救这几个幸存者。