Definition: to breathe air in through your nose in order to smell something Level: C2
他闻了闻他的袜子，看看是否需要清洗。
He ___sniffed his socks to see if they needed to be washed.
狗喜欢互相嗅闻。
Dogs love ___sniffing each other.
杰克用手指碾碎新鲜香草并闻了闻。
Jack crushed the fresh herbs between his fingers and ___sniffed.
