他们还强调了避免表面比较和“升降机经济学”(elevator economics)的重要性，“升降机经济学”强调不同时间和不同国家间的微小差异。
They also say the importance of avoiding superficial comparisons and "elevator economics" that stress small differences over time and across countries.
物流的时间价值是指同一商品在不同时间的价值差异。 。
Time value in logistics refers to the differences in value of the same goods at different time.
冻存不同时间的软骨细胞组之间无明显差异。
There was no obvious difference among the chondrocytes frozen at different time.
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