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International aid is a moral obligation for developed nations.
国际援助是发达国家的道德义务。
youdao
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South Sudan will also be one of the world's least developed nations.
南苏丹也将成为世界上最不发达的国家之一。
youdao
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South Sudan will also be one of the world's least developed nations.
南苏丹也将成为世界上最不发达的国家之一。
youdao