鸭子的构成特征：a common bird that lives on or near water and has short legs, webbed feet and a wide beak. There are many types of duck , some of which are kept for their meat or eggs.
- 一种常见的鸟（a common bird）
- 生活在或靠近水的地方（lives on or near water）
- 有短腿（and has short legs）
- 蹼足和宽喙（webbed feet and a wide beak）
- 鸭子有很多种类（There are many types of duck）
- 一些鸭子被饲养为了它们的肉或者蛋（some of which are kept for their meat or eggs）
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