I believe her motives are unselfish.

我相信她的动机是无私的。

I don't know how to repay you for your unselfish help.

我不知该如何回报你无私的帮助。

He is so unselfish that everyone is willing to be his friend.

他非常慷慨，大家都愿意跟他做朋友。

As a player he was unselfish, a true team man.

他是一名无私的参与团队合作的运动员。

She started to get a reputation as an unselfish girl with a heart of gold.

她开始得到有着金子般心灵的无私女孩的名声。

Organ donation to strangers is considered an unselfish act.

捐赠器官给陌生人是一种无私的行为。

You have to be unselfish.

你必须无私。

He's very thoughtful and unselfish.

他体贴温柔，大公无私。