latchkey

详细解释:n. 弹簧锁钥匙

英语解释：

名词 latchkey:

key for raising or drawing back a latch or opening an outside door

例句：

She won't interfere with you any more; your independence is achieved and you have won your latchkey.她再与也不会干涉你了，你有了独立自主权，你已经有了你自己出入大门的钥匙。