Next, I'll give an example of an old (but still widely used) attack, which involves sniffing passwords right off the network.

接下来，我将给出一个老的(但仍广泛使用的)攻击示例，它就在网下嗅探密码。

youdao

He could hear the pups sniffing and yelping to him, and Shep backed off and barked in alarm.

他能听见小狗们的嗅声、朝他叫的吠声、牧羊犬来回走的脚步声及像拉警报一样的吠声。

youdao

Our crook-sniffing equipment is sensitive and we can usually smell a phony a good way off.

FORBES: Dow Jones Interactive

First, the scent must give off an inviting bloom from the bottle's plastic cap, to win over a shopper sniffing in the store aisle.

WSJ: Does This Smell Clean to You?