common walnut

例句：

1. 1.Common walnuts are a popular snack in many parts of the world.
   普通核桃是世界上许多地方的流行零食。
2. 2.The walnut tree is known for its large, hard nuts that are rich in fat and protein.
   核桃树以其大型、坚硬的坚果而闻名，这些坚果富含脂肪和蛋白质。
3. 3.Walnuts are often used as a healthy alternative to other types of nuts, such as almonds or cashews.
   通常，核桃被用作其他类型坚果如杏仁或腰果的健康替代品。