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halfpipe

noun

🔊/ˈhɑːfpaɪp/

🔊/ˈhæfpaɪp/

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a structure or a channel cut into snow, in the shape of a U, used for performing complicated movements in skateboarding, rollerblading and snowboarding（滑板、轮滑、滑雪等运动中供人完成复杂动作的）U 字形滑道，半管