那位鉴赏家小心翼翼地闻了闻葡萄酒，在品尝之前评估它的香气。

The connoisseur ___sniffed the wine cautiously, evaluating its bouquet before taking a sip.

安检犬勤勉地嗅闻着行李，它受过训练，能探测出任何违禁物品。

The security dog ___sniffed diligently at the luggage, trained to detect any prohibited substances.

那只好奇的小狗在路上遇到的每一个新东西都要闻一闻。

The curious puppy ___sniffed every new object it encountered on its walk.