刺心刻骨
      Explanation: ① that deep gratitude. ② also as a "thorn eager to bone." The heart is extremely indignant.
      Source: Qing Chen Que, "A rose Yun promoting the book" Following the teaching of this, until the heart is thorn deep-seated, younger brother of honesty much to say carry on. "
      Examples: Their right and wrong, and we often reversed. So often we have to ~, and they are laughing grace of the eye. ★ Bing Xin, "to the young reader" Six