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.
我测试的时间，虽然我的车是完美的比较，有一些在表面的抓地力。
I compare with testing time and although my car is perfect, there is little grip in the surface.
目的本实验用显微硬度测量法，定量研究和评估人离体牙釉质在酸性饮料中的硬度变化，比较牙釉质在饮料中浸泡时间及浸泡频率对釉质表面硬度的影响。
Objective This in vitro study quantitatively assessed the effect of frequency and time span of immersion of human teeth in acidic soft drinks on enamel surface microhardness.
本文对三组不同组分的蛋白解离液在不同温度和时间对变链球菌细胞表面蛋白抗原的提取进行了比较。
This paper made a comparison of extracting antigen of S. Mutans by three groups of protein isolation solution under different time and temperature.
表面看来比较容易管理的航班计划往往没有考虑到风暴、空中交通拥堵或其他可能的延误，这些因素也会令本已过长的工作时间变得更长。
Flight schedules that look manageable on paper often don't account for storms, air-traffic congestion or other potential delays that can make a long work day longer.
表面看来比较容易管理的航班计划往往没有考虑到风暴、空中交通拥堵或其他可能的延误，这些因素也会令本已过长的工作时间变得更长。
Flight schedules that look manageable on paper often don't account for storms, air-traffic congestion or other potential delays that can make a long work day longer.
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