welding flame

例句：

1. 1. The welding flame was so intense that it could be seen from a distance.
   焊接火焰非常强烈，可以从远处看到。
2. 2. During the welding process, the welding flame is used to melt and join metal parts together.
   在焊接过程中，焊接火焰用于熔化和连接金属部件。
3. 3. The welding flame can be dangerous if not handled properly, as it can cause burnsor damage to the surrounding area.
   如果不妥善处理，焊接火焰可能是危险的，因为它可能会烧伤周围区域或造成损害。