n. 
质层
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cog,
cog wheel,
Cogas,
cogasin,
cogbell,
cogelled,
cogency,
cogeneration,
cogenetic,
cogent,
相似单词
homoseryl,
homosex,
homosexual,
homosexuality,
homospecificity,
homosphere,
homosporangic,
homosporangium,
homospore,
homosporous,