天鹅

例句：

1. 1. The swan glides gracefully across the lake.
   天鹅优雅地在湖上滑行。
2. 2. The swan is a symbol of beauty and elegance.
   天鹅是美丽与优雅的象征。
3. 3. The swan is a protected species in many countries.
   许多国家将天鹅列为保护物种。