By looking through the lenses, van leeuwenhoek realized that there was a whole world filled with microscopic living things.
范.拉乌文胡克通过透镜观察，认识到整个世界都充满了微生物。
It is interesting to note that magnifying lenses were used by Bacon in the late1200s, but had never been focused on a drop of water until the1600s by Leeuwenhoek.
有趣的是我们注意到，虽然培根在13世纪末期就使用放大镜了，但直到17世纪才由列文虎克将放大镜对准一滴水。
