microscopically       
adverb uk/ˌmaɪ.krəˈskɒp.ɪ.kəl.i/ us/ˌmaɪ.krəˈskɑː.pɪ.kəl.i/
 science specialized用显微镜地;用显微镜可见地 
in a way that uses or can only be seen with a microscope (= a device that makes very small objects look larger)
  microscopically small 微小的 
 Microscopically, both kidneys showed many small scars. 用显微镜可见两个肾脏上都有许多小疤。 
 See: microscopic
 - More examples
 - Zooplankton is an assortment of marine animals which range from microscopically small to several centimetres long.
 - Tissue lining the cavity is removed and examined microscopically.
 - a pair of microscopically small gold hotpants