单词	类时四矢量
释义	类时四矢量time-like four-vector
随便看	vertical compound steam turbine vertical compressor vertical concrete mix batching plant vertical concurrence vertical condenser vertical configuration vertical conflict vertical continuation vertical -contraction vertical control vertical control datum vertical-control datum vertical control network vertical control point vertical control points vertical control survey vertical control system vertical convection vertical convergence vertical convergence distance vertical converter vertical cooler vertical cooperative advertising vertical coordinate vertical coordinate of the center of mass