及物动词
1. He sniffed the fresh morning air.
他吸进早晨的新鲜空气。
不及物动词
1. My roommate sniffed at my idea of becoming an artist.
我的室友对我要当艺术家的想法嗤之以鼻。
2. They all had colds and were sniffing and sneezing.
他们都伤风了，呼呼喘气而且打喷嚏。
名词
1. sniff的解释
1. Take a sniff at everything and distinguish the good from the bad.
对任何东西都要用鼻子嗅一嗅，鉴别其好坏。