这个词是什么意思？
A genus of gram-negative, aerobic, facultatively methylotrophic rods occurring singly or occasionally in rosettes. Members of this genus are usually motile and are isolated from soil, dust, fresh water, lake sediments, leaf surfaces, rice, air, and hospital environments. (From Bergey's Manual of Determinative Bacteriology, 9th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D020580 · MeSH 2026。
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