sub-micron

例句：

1. 1. The microscope has a resolution of 0.2 microns.
   显微镜的分辨率为0.2微米。
2. 2. The particle size distribution is measured using a sub-micron particle counter.
   使用亚微米粒子计数器测量颗粒大小分布。
3. 3. Sub-micron particles have unique properties that are not found in larger particles.
   亚微米粒子具有独特的性质，这些性质在更大的粒子中找不到。