引导; 定向; 定航向
An expression that is the sum of a real number and a vector and that contains four terms, one real and three imaginary. 四元数一实数和一矢量的和的表达式,有四个项,一个为实数项,另外三个为虚数项
Request radar vectoring for an ILS approach. 请求雷达引导盲降进近。