求翻译：There were once three sons of a wealthy businessman. 1they met, the two eldest, who were twins, 2to quarrel about which of them should be his father’s heir（继承人）. The youngest, who was not 3ambitious （野心勃勃的）, took no part in their argument. As soon as they left home, the father arranged for an adequate income to be prov是什么意思？

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