spindle-shaped solid

例句：

1. 1.The spindle-shaped solid is a common type of rock formation.
   纺锤形固体是一种常见的岩石形成类型。
2. 2.The spindle-shaped solid has been used in many industries for its unique properties.
   纺锤形固体因其独特的性质而被广泛应用于许多行业。
3. 3.The spindle-shaped solid is often used as a tool to shape metal into desired shapes.
   纺锤形固体通常被用作工具，将金属加工成所需的形状。