the legal right to cross or use someone else's land for a particular purpose

Under the conservation easement, he will continue to own the ranch but has sold his rights to develop it. 受自然保护地役权规限，他可以继续拥有牧场，但已经出售了该地块的改建权。

If the state doesn't purchase a permanent easement after five years, the farmer can remove his land from the program. 如果州政府在五年后不买下一块有永久地役权的土地，农场主可以把地块撤出该计划。