短語詞組短語imaginary y circle 虛圓imaginary axis circle 虛圖imaginary tangent circle 假想切圓imaginary axis circle at infinity 無窮遠虛圓imaginary circle at infinity 無窮遠虛圓;虛球圓imaginary circle point 虛圓點imaginary circle diagram 虛數(shù)圓圖 返回 imaginary circle