2. The dogs are trained to sniff out drugs. 这些狗是经过训练的嗅毒犬。
3. If he likes the wine, he'll actually sniff it. 如果他喜欢这种酒,他会闻一闻。
4. When offered anything unusual to eat, a pig will sniff at it and nibble gently. 当提供不同以往的食物时,猪会嗅,并轻轻地啃。
5. Biologists also noted deer sniff and lick an unfamiliar rub, which suggests that this visual mark on a small tree plays an important communication purpose in the social life of deer. 生物学家也注意到鹿会嗅和舔陌生的擦痕,这表明小树上的这种视觉标记在鹿群的社会生活中起着重要的交流作用。