核心问题
（1）In the agreement, Antonio made a promise to allow Shylock to take a pound of his flesh from whatever part of his body if he did not pay the money back at the end of three months.
(2) If Shylock cuts deep enough, I'll pay him back with all my heart.
句(1)中有 pay the money back, 而句(2)中有 pay him back。它们表示的意思相同吗?
词典解答
pay the money back 和 pay sb. back 都是正确的用法。但意思有所不同。前者是指“把特定的钱还回去”，后者则是指“向某人还钱”：
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We paid back the $100 we owed Mr. Brown. 我们归还了向布朗先生借的100美元。
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Lend me £ 5, will you? I'll pay you back at the end of the month. 借我 5 英镑, 行吗? 我月底就还给你。
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I must remember to pay you back for the concert tickets. 我必须记住把买音乐会票的钱还给你。