customary tenure 习惯保有
leasehold tenure 租赁管业权
security of tenure 职位的稳定性
例句：
Your tenure as boss was a short one.
你当领导的任期很短。
He did nothing noteworthy during his tenure.
他在任职期间毫无建树。
There might be a few steps in the chain of tenure.
在土地保有权的环节中可能存在几个步骤。