thrush breast heart

例句：

1. 1. The robins are singing in the garden.
   知更鸟们在花园里唱歌。
2. 2. The robins are a symbol of spring.
   知更鸟是春天的象征。
3. 3. The robins are known for their bright colors and cheerful songs.
   知更鸟以其鲜艳的颜色和欢快的歌声而闻名。