If you say that someone is selfless, you approve of them because they care about other people more than themselves.
例句
She was a wonderful companion and her generosity to me was entirely selfless...她是一个极好的伴侣，她对我慷慨大方，一心只为我着想。Perhaps the only all-enduring and selfless love was that of a mother for her child.或许唯一持久无私的爱就是母爱。
英英词典释义
Adverb
1. in an altruistic manner;
"he acted selflessly when he helped the old lady in distress"