microscopic cross-section

例句：

1. 1. The microscope is used to examine microscopic objects.
   显微镜用于观察极小物体。
2. 2. The scientist discovered a new species of microorganism in the microscopic world.
   科学家在微观世界发现了一种新的微生物。
3. 3. The microscope can magnify small objects up to 100,000 times.
   显微镜可以将小物体放大到10万倍。