gaining in weight of lamb

例句：

1. 1. The farmer is worried about the increasingweight of his sheep.
   农民担心他的羊只体重增加。
2. 2. The baby lamb gained alot of weight during its first few weeks.
   这只小羊羔在最初的几周里体重增加了很多。
3. 3. The farmer decided to feedthe lamb more to ensure it didn't gain too much weight.
   农民决定给羊羔多喂一些食物，以确保它不会增重太多。