plump up

例句：

1. 1. Thebaby is plumping up nicely.
   宝宝正在健康成长。
2. 2. He's trying to bulk upfor the marathon.
   他正试图为马拉松增重。
3. 3. The soup has thickened upnicely since I added the cream.
   自从我加了奶油后，汤已经变得浓稠了。