submicron aerosol

例句：

1. 1. The particle size of the material is submicron.
   该材料的粒径为纳米级。
2. 2.Submicron particles are difficult to detect with the naked eye.
   用肉眼难以观察到纳米粒子。
3. 3. Submicron technology has revolutionized the field of medicine.
   纳米技术已经彻底改变了医学领域。