vfr 基本解释 visual flight rules [空]目视飞行规则 同首字母单词 v [viː] vaal vaalhaai ['fɑːlhaɪ] vaaljapie ['fɑːljɑːpɪ] vacancy ['veɪk(ə)nsɪ] vacant ['veɪk(ə)nt] vacate [veɪ'keɪt; və'keɪt] vacation [vəˈkeɪʃn] vacationer [veɪˈkeɪʃnə(r)] vacationist [və'keɪʃənɪst] vacationland [və'keɪʃ(ə)nlænd] vaccinal ['væksɪnəl]