So if the bacterial odor molecule is present, the CO2 sniffers turn off, presumably to allow the mosquito to concentrate on the close-range foot target.

因此，如果这个细菌的气味的分子出现的话，二氧化碳的探测则终止。这大概是为了让蚊子去专心于眼前的食物吧。

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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。

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The flowers gave off a fragrant odor.

花发出一阵幽香。

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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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