单词	双频道
释义	双频道dual channels
随便看	projection [upon a plane] projection velocity projection vertexometer projection, vertical projection weld projection welding projection welding machine projection wielding project, irrigation projective projective astroid projective closure projective coordinates projective coordinates system projective correspondence projective cover projective curvature tensor projective curve projective determinacy projective differential geometry projective dimension projective equivalence projective erometry block projective erometry block--code projective frame