The performances of modern colour-difference formulae were investigated to evaluate very small colour difference at human eyes threshold level based on object surface colours.
基于物体表面色样本的视觉评价，测试常用色差公式在人眼阈值水平的微小色差预测性能。
Another ring for the difference between the base-level, allowing the ferrule at the base of the non-standard technology of surface markers.
为区别另一套圈的基准面，允许在该套圈的的非基准面上标工艺标志。
The difference is mainly represented as the surface and the deeper levels of comprehension, or the explaining level and the researching level.
这种理解分歧主要表现为表层和深层两个层次，即解释的层次和研究的层次。
Each encounters a reflective surface, the echo on the oscilloscope screen displayed the impedance difference between the two interfaces also determine the level of echo amplitude.
每遇到一个反射面时，回声在示波器的屏幕上显示出来，而两个界面的阻抗差值也决定了回声的振幅的高低。
Each encounters a reflective surface, the echo on the oscilloscope screen displayed the impedance difference between the two interfaces also determine the level of echo amplitude.
每遇到一个反射面时，回声在示波器的屏幕上显示出来，而两个界面的阻抗差值也决定了回声的振幅的高低。
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