美洲山核桃

例句：

1. 1. The tree is a rare species in the United States, known for its large nuts.
   这棵树是美国的稀有物种，以其大坚果而闻名。
2. 2. Native Americans used to eat these nuts as a source of protein and energy.
   原住民过去用这些坚果作为蛋白质和能量的来源。
3. 3. The nut is high in fat and calories, making it an excellent snack for athletes.
   这种坚果脂肪含量高，热量也很高，因此是运动员的理想零食。