evelite

任何小到人类裸眼不能看见的的生命体都是微生物。作为一个整体，这个类别覆盖了一个广泛而又庞大的生物群落。从寄生虫和病毒到真菌和昆虫，人类对这些生物的研究和利用相当地广泛。

Any life form too small to be detected by the unaided human eye qualifies as a microorganism, yet as a whole, this classification of biology covers an enormous and diverse spectrum. From parasites and viruses to fungi and insects, the study or industrial application of these creatures is just as broad.