无私的奉献精神 Selfless offer spirit / The Spirit of Selfless dedication / The Spirit of Selfless contribution 以上的都是同一个意思.

无私的 Selfless
例句：The instructor choose to dedicate more hours to motivating and helping his group with the spirit of selfless contribution.那个教练用无私的奉献精神选择贡献更多的时数来鼓励及帮助他所教的团体.