分析机器人依靠传感器通过测量地表土壤中气味浓度搜索地下气味源的定步长六边形路径算法的不足，对其进行改进。

This paper analyzed the disadvantages of the traditional algorithm of hex-path odor searching algorithm, which can guide a mobile robot with single gas sensor to search for underground odor source.

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但是科学家们揭示，鲨鱼鼻孔接受气味的时间比气味的浓度更重要。

But scientists now can show that differences between the time when a shark's nostrils receive smells is more important than the strength of the odors.

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在足够高的浓度，许多的气味会导致几乎每个人的鼻腔刺激。

In high enough concentrations, many odors will cause nasal irritation in almost anyone.

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