seed unit

例句：

1. 1. The plant breeder needs to count the number of seedsin each unit to ensure uniformity.
   植物育种家需要计算每个单位的种子数量以确保一致性。
2. 2. The research team used a seed unitto study the growth patterns of different species.
   研究团队使用一个种子单位来研究不同物种的生长模式。
3. 3. The farmer planted a largenumber of seeds in the field to increasethe yield.
   农民在田间种植了大量的种子以增加产量。