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单词 环状结构
例句 DEFINITIVE EXAMPLES 权威例句〔acyclic〕Chemistry Having an open-chain molecular structure rather than a ring-shaped structure.【化学】 无环的:具有开链分子结构的,而非环状结构美国传统〔annulation〕A ringlike structure, segment, or part.环状物:环状结构或部分美国传统〔azine〕A six-membered heterocyclic compound, such as pyridine, that contains one or more atoms of nitrogen with a ring structure resembling that of benzene.吖嗪,连氮:由六种元素构成的杂环化合物,如氮苯(吡啶),它由一个或更多的氮原子构成,呈环状结构,类似苯的结构美国传统〔collar〕Biology An encircling structure or bandlike marking, as around the neck of an animal, suggestive of a collar.【生物学】 硬领:一种环状结构或带状斑纶,如环绕在动物的脖颈上好象一个衣领美国传统
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