white knight

例句：

1. 1. The white knight came to the rescue of the princess in distress.
   白马骑士来救援陷入困境的公主。
2. 2.He was hailed as a hero for saving many lives during the flood.
   他在洪水中拯救了许多生命，被誉为英雄。
3. 3. She believed that he was her savior in life's storms.
   她相信他是她在生活风暴中的救星。