spherical crucible

例句：

1. 1.The scientists used a spherical crucible to melt the metal.
   科学家们使用一个球状坩埚来熔化金属。
2. 2.The experiment was conducted in a spherical crucible filled with sand.
   实验在装满沙子的球状坩埚中进行。
3. 3. The chemical reaction occurred spontaneously in a spherical crucible.
   化学反应在球状坩埚中自发发生。