New Words：

sniff [snɪf]
n.闻；嗅；抽鼻子
v.闻；嗅；抽鼻子

Sample Sentences：

She took a deep sniff of the books.
He lifted his nose and sniffed.
The dog stopped and sniffed at my shoes.
We all had colds and couldn't stop sniffing.
When Floopy meets another dog, they sniff each other for a while.

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