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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	brainstorm brainstorming brainteaser Braintree brain trust brainwash brainwashing brainwashings brain wave brainwork brainworker brainworm brainy brain–picking braise braised braises braising braize brak brake brake brake braked brake drum

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