All his geese are swans.

例句：

1. 1. The swan is a graceful bird with along neck and white feathers.
   天鹅是一种优雅的鸟类，有着长长的脖子和白色的羽毛。
2. 2. The swan is asymbol of beauty and elegance inChinese culture.
   天鹅是中国文化中美丽与优雅的象征。
3. 3. The swan is apopular subject for art and literature.
   天鹅是艺术和文学中常见的主题。