Altering a single chemical bond can shift a scent from sweet to rancid.

改变单个化学键可以将气味从甜味转变为腐臭味。

So for each mitral cell, there are any number of olfactory axons synapsing with it, each representing and identifying a single volatile chemical.

所以对于每个二尖瓣细胞，有任意数量的嗅觉轴突与其突触，每个代表并识别一种挥发性化学物质。