Why oh why do people keep leaving the door open?
人们到底为什么总敞着门呢？
For reasons of security the door is always kept locked.
为了保证安全，门总是锁着的。
The agreement will open the door to increased international trade.
此协议将会提供增加国际贸易的机会。
The government's policy is an open door to disaster.
政府的政策为灾难敞开了大门。
There's building work going on next door.
邻居正大兴土木。