短語詞組短語velocity feature vector 速度特征矢量leading centre velocity poynting vector 引導(dǎo)中心速度velocity -vector measuring system 速度矢量測(cè)量系統(tǒng)wind velocity vector 風(fēng)速向量angle of velocity vector 航速矢量角normal velocity vector [數(shù)]法速向量instantaneous velocity vector 肯時(shí)速度向量rolling about velocity vector 繞速度矢量旋轉(zhuǎn)velocity vector model 速度矢量模型 返回 velocity vector