sodium amalgam

例句：

1. 1. The sodium amalgam is used in the production of various alloys.
   钠合金用于生产各种合金。
2. 2. Sodium amalgam is a useful material for making fireworks.
   钠合金是制作烟花的有用材料。
3. 3. The sodium amalgam was used to coat the surface of the metal before it was soldered.
   在焊接前，钠合金被用来涂覆金属表面。