"sniff the perfume"
"the sick student was sniffling in the back row"
The police were determined to sniff out the ringleaders.
警方决心要找到匪首。
Police sent dogs into the crowd to sniff out the drugs.
警察把警犬放到人群中去嗅出毒品。
The dog sniffed the fox out.
狗闻出了狐狸的味道。
He says he can sniff out trouble before it starts.
他说他能在麻烦事发生之前就觉察出来。
He sniffed the vapour up.
他吸入蒸汽。
If you sniff up this special drug, it will clear your head.
如果你把这种特殊的药物吸入鼻腔,就能使头脑清醒。
It is a preparation to be sniffed up through the nostrils.
这是一种由鼻吸入的药物。