这个词是什么意思？
A genus of polyhedral plant viruses of the family COMOVIRIDAE causing ringspots and spotting on leaves or sometimes symptomless infection. Transmission occurs by seeds, soil nematodes, or experimentally by mechanical inoculation. Tobacco ringspot virus is the type species.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D017860 · MeSH 2026。
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