It's in the best interest of the landlord to keep a steady business leasing his property.

简：租用他的财产来维持稳定的业务符合房东的最大利益。

By an act passed in 1866, Congress gave to former slaves the rights of white citizens in the matter of making contracts, giving testimony in courts, and purchasing, selling, and leasing property.

通过 1866 年通过的一项法案，国会赋予前奴隶白人公民在签订合同、在法庭上作证以及购买、出售和租赁财产方面的权利。

In this case, it is in the best interest of the landlord – meaning it would be a good thing for the landlord – to keep a steady business leasing his property.

在这种情况下，保持租用其财产的稳定业务符合房东的最大利益——这对房东来说是一件好事。

Jane says, " It's in the best interest of the landlord to keep a steady business leasing his property." If you say something is " in the best interest" of someone, you mean that it's a good situation for that person.

Jane 说：“租用他的财产来维持稳定的业务符合房东的最大利益。”如果你说某件事“符合某人的最大利益”，你的意思是这对那个人来说是个好情况。