1. Please use the knocker to announce your arrival at the front door.
请使用门环来通知你到达前门。

2. The knocker on this door is beautifully crafted and adds a touch of elegance to the entryway.
这个门上的门环做工精美，为入口增添了一丝优雅。

3. I heard the knocker banging loudly in the middle of the night, signaling an unexpected visitor.
我听到门环在深夜里响亮地敲击，预示着一位意外的访客。

4. The brass knocker on the old wooden door had a weathered look, showing its age.
老木门上的铜门环看起来久经风雨，显示出它的年代。

5. The knocker fell off the door and had to be reattached with screws.
门环从门上掉了下来，必须用螺丝重新安装。

6. The sound of the knocker echoed through the empty hallway, signaling the arrival of the unexpected guest.
门环的声音在空荡荡的走廊中回响，预示着意外访客的到来。