sniff at 轻视；嗤之以鼻
sniff around 到处嗅探
sniff out 查出；嗅出
cold sniff 感冒时的抽鼻子
sniffle 吸鼻子
A: Why did you sniffed the food before eating it?
A：你为什么在吃之前先闻了闻食物？
B: I sniffed it to make sure it was safe.
B：我闻一下是为了确保它是安全的。
1) 用鼻子吸气闻气味
2) 因感冒或哭泣而抽鼻子
3) 表示轻视或不屑（sniff at）
4) 侦查性地嗅探
1. 用鼻子吸气闻气味或检查气味
2. 因感冒、哭泣等原因抽鼻子
3. 表示轻蔑地看待或拒绝
verb
1. to smell something by taking air in through your nose, or to breathe in quickly through your nose, often because you are crying or have a cold; also to show dislike or contempt.
Synonym: smell, snuffle, scoff