a crocus corm的用法和样例：
- A perennial plant, such as a crocus or tulip, propagated by buds on underground bulbs, tubers, or corms.
- Physiological and ecological effects of potassium on expansion of crocus corm
- There is a vein of melancholy in his character.
- There was a long lag in forwarding mail to us.
- A bowl of hot chicken soup is good for you.