uniform particle size

例句：

1. 1. The uniforms are wornby all the soldiers in the army.
   军队中的士兵们都穿着制服。
2. 2. Theuniforms were designed tomake the soldiers look more professional.
   这些制服的设计是为了让士兵看起来更专业。
3. 3. The uniforms are made ofa special material that keeps the soldier warmand dry.
   这些制服是由一种特殊的材料制成的，可以让士兵保持温暖和干燥。