The odr-10 gene, which makes the odor receptor protein that detects diacetyl, is active in neurons that guide the worm toward a scent.

odr-10基因使接收气味的蛋白质能辨识联乙醯，是神经元中引导蛔虫追踪气味的活跃部分。

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The idea is that every odor molecule that enters our nose has a specific shape that fits a specific receptor-like a key fits a lock-allowing us to detect, say, the acrid aroma of burnt coffee.

这个想法是，每一个进入我们的鼻子的气味分子都有一个特定的形状，相互吻合的特定受体——就像锁和钥匙一样——使我们能够感知，例如感知焦咖啡的刺鼻气味。

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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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To make their mice hypersensitive to explosives, the researchers altered the gene responsible for the DNT receptor so that the transgenic mice have as many as one million neurons in which the odor receptor is tuned to the fragrance of a land mine.

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To breed a better mine-sweeper, the Hunter researchers took advantage of the recent discovery of a receptor in the rodent brain for the odor of a chemical known as 2, 4-dinitrotoluene (DNT), which is essentially the same as TNT, which stands for trinitrotoluene.

WSJ: Sniffing Out a More-Efficient Mine Sweeper

Each odor-sensing neuron has just one type of aroma receptor.

WSJ: Sniffing Out a More-Efficient Mine Sweeper