松球

例句：

1. 1. The tree produces acorns, which are the seeds of oak and pine trees.
   这棵树结出橡子，是橡树和松树的种子。
2. 2. The acorns are a great source of nutrition for animals.
   橡子是动物极好的营养来源。
3. 3. The acorns are often used in cooking as a substitute for nuts.
   橡子常被用作坚果的替代品用于烹饪。