研究者们还需要判断嗅觉到底是一种还是两种感觉，一种感觉回应气味本身，另一种感觉记录空气中无味的化学成分。

Researchers have still to decide whether smell is one sense or two—one responding to odours properly and the other registering odourless chemicals in the air.

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讽刺的是，她变成了嗅觉丧失者。

Ironically, she became anosmic.

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例如，它能削弱幼年小丑鱼的方向感和嗅觉，让它们更容易受到捕食者的攻击。

For example, it can impair orientation and sense of smell in young clownfish, making them more vulnerable to predators.

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