For example, in our sinuses, there are millions of receptor proteins that detect different odor molecules by switching from an 'off state' to an 'on state.

比如，鼻窦就有几百万个检测不同气味分子的受体蛋白，可实现从‘关闭状态’到‘开启状态’的转换。

youdao

The flowers gave off a fragrant odor.

花发出一阵幽香。

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The room gave off a clean, sharp odor of linseed oil that reminded me of my father's clothes when he had returned from the tile factory at night. It smelled like wood and fresh-cut hay mixed together.

室内散发着一股清新、刺激的亚麻籽油气味，使我想起晚上父亲从瓷砖工厂下班后，衣服上残留的味道，闻起来像木头与新割的干草混在一起。

youdao

They waddle down to the water to wash off the rust-colored guano that stains their pelts and produces a pungent odor that within days becomes expected with each landing.

FORBES: Go with the Floe

His traditional white Arab tunic is no longer very white, and he gives off the odor of someone who's slept in his car for the past two days in the baking heat - waiting in line.

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