偷窥者

例句：

1. 1. The night was dark and the only sound was the occasional croak of a frog.
   夜晚很黑，唯一的声音是偶尔的青蛙叫声。
2. 2.He was so deep in thought that he didn't notice the croaking frogs until they were right on top of him.
   他沉浸在思考中，以至于没有注意到青蛙就在他头顶上叫。
3. 3.The park had been closed for several days due to the heavy rain, and the only sounds were the croaking frogs.
   由于大雨，公园已经关闭了几天，唯一的声音是青蛙的叫声。