sniff /snif/ I. vi. & vt. 从鼻吸气；嗅；闻；蔑视：sniff at 嗅，闻；瞧不起…；蔑视…：sniff at a rose 闻玫瑰花 sniff out 嗅出：These dogs can sniff out explosives.这些狗能闻出炸药。They’re quick to sniff out a deception.他们迅速察觉到有骗局。‖II. n. 吸气，嗅：Take a sniff at everything and distinguish the good from the bad.对于任何东西都要用鼻子嗅一嗅，鉴别其好坏。