He wanted to have a source of income after his retirement; until then, he wouldn't require additional money.
他想在退休后有个收入来源，而这之前则不需要额外的钱。
Besides, depending on your success, you may be able to monetize your blog and make it an additional source of income.
此外，依赖你这种成功，你可以将你的博客成为你赚钱的工具来做为你额外的收入。
It could be an additional source of income.
这可能成为另一个收入来源。
It could be an additional source of income.
这可能成为另一个收入来源。
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