短语词组短語turning -point range 轉點頻段modern turning -point 現代轉曏historical turning -point 歷史轉折點Turning -point of our Life 生活的轉折點;捨伍德·安德生be at a turning -point 処於轉折點singular value curve turning -point method 奇異值曲線轉折點法 返回 turning-point