Their property abuts [=adjoins] our property. = Their property and our property abut each other. [=their property is directly next to our property; an edge of their property touches an edge of our property]他们的地产和我们的紧挨着。
[no object]
Their property and our property abut.他们的地产和我们的紧挨着。
— often + on
Their property abuts on our property.他们的地产和我们的紧挨着。