The invention of the visible light microscope late in the 16th century introduced a previously unknown realm of single-celled plants and animals.
16世纪后期，可视光学显微镜的发明使人类第一次观察到了单细胞动植物的世界。
The invention of the visible light microscope late in the 16th century introduced a previously unknown realm of single-celled plants and animals.
16世纪后期，可视光学显微镜的发明使人类第一次观察到了单细胞动植物的世界。
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