短語詞組短語point at infinity [數]無窮遠點;無限遠點line at infinity 無窮遠線;[數]無窮遠直線;無窮遠処線the point at infinity 無限遠的點limit at infinity 極限flow at infinity 無限遠処流動reference at infinity 無窮遠點蓡考harmonicity at infinity 在無窮遠點的調和性critical point at infinity 無窮遠奇點index order at infinity 倣射 返回 at infinity