lion's-ear

例句：

1. 1. The lion's ear is a symbol of courage and strength.
   狮子的耳朵象征着勇气和力量。
2. 2. The lion's ear was used as a warning device in ancient times.
   狮子的耳朵在古代用作警告装置。
3. 3. The lion's ear is often found on the side of buildings to deter thieves.
   狮子的耳朵常被安装在建筑物侧面，以阻止小偷。