焊锡

例句：

1. 1. The technician carefully solders the joints together.
   技术员小心翼翼地将接头焊接在一起。
2. 2. The old car needed a lot of solder to fix its engine.
   这辆旧车需要很多焊锡来修理它的引擎。
3. 3. The solder was so hot that it melted the metal.
   焊锡太热了，把金属都融化了。