种脐

例句：

1. 1. The seeds are the reproductive parts of the plant.
   种子是植物的繁殖部分。
2. 2. The plant's seed is enclosed in a protective casing.
   植物的种子被一个保护性的外壳包裹着。
3. 3. The seeds are spread by birds and other animals.
   种子通过鸟类和其他动物传播。