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词汇	annual ring
释义	annual ringn.Botany（名词）【植物学】annual ringcross section of aDouglas fir tree 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
随便看	dangers danging dangle dangleberry dangled transfer transferal transferals transferase transferases transferee transferees transference transferences transfer factor transfermium transferor transfer payment transferral transferred transferrin transferring transferrins transfer RNA transfers

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