Obviously, if you hold a bond to maturity, you get your original investment back.

显然，如果您持有债券至到期日， 您将收回原始投资。

But once he started, he built up an original investment of fifty-five borrowed dollars into a business of his own that made him twenty thousand dollars a year.

但是一旦开始， 他就用借来的 55 美元建立了自己的企业， 每年赚两万美元。