The testing of olfactory threshold can be standardized scientifically and quantitatively by using standard olfactory liquids.

嗅觉标准液是可使人的嗅觉阈值测试标准化，科学化，数量化。

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There was no statistical difference in the olfactory threshold among W-workers, pathologists and controls(P>0.05).

三组人员的嗅觉阈差异无统计学意义（P >0 .0 5 ）。

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