单词	alpine birch
释义	alpine birch noun : a low shrub (Betula nana) native in high northern regions Word History First Known Use 1824, in the meaning defined above
随便看	shear pin shear plane shear skid shear steel shear strength shear stress shear structure shear wave shear zone shearbill sheard sheared sheared off shearer shearers sheargrass shearhog shearier sheariest shearing shearing deformation shearing die shearing machine shearing off shearing plane

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