Living things such as bacteria, molds, viruses and parasites that cannot be seen with the unassisted human eye.

无仪器辅助情况下，肉眼不可观测到的活体生物，如细菌，霉菌，病毒或寄生物等。

youdao

Living things such as bacteria, molds, viruses and parasites that cannot be seen with the unassisted human eye.

无仪器辅助情况下，肉眼不可观测到的活体生物，如细菌，霉菌，病毒或寄生物等。

youdao