it is fixed by it is fixed by law,agreement,or other means.

问题描述:

it is fixed by
it is fixed by law,agreement,or other means.

这是法律上已经界定(确定)了的!

它是由法律规定

这已经由法律、协议和其他方式确定下来

其已经由法律、协议或其他方式确定。