private door的用法和樣例：
例句
- The big door has a wicket in it.
大門上有一個便門。 - But at last he heard the wicket-gate in the great outer door click behind him, felt the fresh air of the outer world upon his anxious brow, and knew that he was free!
最後，他終於聽到監獄大門上的便門在他身後咔噠一聲關上了，感到外面世界的新鮮空氣吹拂在他焦慮的額上，他知道，他自由了！
