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单词 annual ring
例句 DEFINITIVE EXAMPLES 权威例句〔annual ring〕The layer of wood formed in a plant during a single year. Annual rings appear concentric when viewed in cross section.年轮:一年里树木长出的层。从截面上看年轮呈同心圆状美国传统〔record〕Annual rings record a tree's age.年轮标示树龄。英汉大词典〔ring〕Botany An annual ring.【植物学】 年轮美国传统
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