ultramicropore

例句：

1. 1.Ultramicropores are the smallest pores in the world, with diameters of only 0.001 micrometers.
   超微孔是世界上最小的孔，直径仅为0.001微米。
2. 2. The nanopore technology has been applied to various fields, such as electronics and materials science.
   纳米孔技术已被应用于电子和材料科学等领域。
3. 3. The ultramicropore structure is a key factor in determining the performance of the material.
   超微孔结构是决定材料性能的关键因素。