He did it all out of kindness.

他做这事完全出于好意.

《现代汉英综合大词典》

They were keeping her only out of kindness.

他们出于仁慈之心才一直收养着她.

《现代英汉综合大词典》

He did it totally out of kindness, not for the money.

他做那件事完全是出于仁慈, 而不是为了金钱.

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I did it all out of kindness.

我完全是出于好心才这样做的.

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She's only doing it out of kindness she's got no particular axe to grind.

她只是出于好心 -- 倒不是别有用心.

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