lock the barn after the horse is stolen的用法和樣例：
例句
- Lock the stable door when the horse is stolen.
賊去關門。 - The jeweller had been burgled twice in a year before he decided to install extra security devices, but it was a case of locking the stable door after the horse has bolted.
這個珠寶商一年內被偷竊兩次后才決定安裝特別的保險裝置，這是一個賊去關門的事例。
