series feed

例句：

1. 1.The farmers use a series of fertilizers to ensure the health and growth of their crops.
   农民使用一系列肥料来确保作物的健康和生长。
2. 2. The series feed is designed to provide the necessary nutrients for the livestock.
   该系列饲料旨在为家畜提供必要的营养。
3. 3. The series feed was introduced to improve the efficiency of animal husbandry.
   该系列饲料的引入是为了提高畜牧业的效率。