a greasy smile的用法和样例：
- He greeted me with a greasy smile
- It was raining a greasy drizzle.
- You can never scare a dog away from a greasy hide .
- You can never scare a dog away from a greasy hide.
- His oily, insinuating tones, his greasy smile, and his monstrous self-conceit grated on my nerves.