to close the stable door after the horse (has bolted / is stolen)
to close the stable door after the horse has bolted
01
後の祭り, 手遅れ
to try to prevent something bad from happening after it has already happened
慣用句
古用法
例
Installing cameras after the robbery was like shutting the barn door after the horse had bolted.
盗難後にカメラを設置しても後の祭りだった。



























