右手系
right-handed system A convention for orienting a coordinate system: when the fingers of the right hand curl from the positive x-axis to the positive y-axis, the
CSCA 数学 考试术语
right-handed system A convention for orienting a coordinate system: when the fingers of the right hand curl from the positive x-axis to the positive y-axis, the
CSCA 数学 考试术语