差异阈
心肌缺血患者和正常人的心肺功能指标在静息下与无氧阈时两组无明显差异。
There was no significant difference in cardiopulmonary function between the normal and myocardial ischemia groups at rest.
三组人员的嗅觉阈差异无统计学意义（P >0 .0 5 ）。
There was no statistical difference in the olfactory threshold among W-workers, pathologists and controls(P>0.05).
结果：附属比色板与相应的材料间存在明显的色度差异，远远超过肉眼的识别阈。
Results: There was significant colour difference between the attached shade guide and the resin materials, and the difference were greater than the value recognized by naked eyes.
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