Xiǎnwēijìng xià de chēlúnchóng xíng sì xiǎo chēlún.
Under the microscope, Trichodina look like little wheels.
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The name is perfectly literal: under a microscope Trichodina has a ring of cilia and a toothed adhesive disk that looks like a spinning cartwheel — 车轮 (cartwheel) + 虫 (creature).
