But reflected type may not reflect the true reflectance of subject surfaces like incident type meters.
但反射式就不能像入射式如实反映各主体表面的反射比率。
Because sediment deposition can occur on inclined surfaces, apparent or measured bed thickness might differ from true bed thickness.
因为沉积作用可能出现于倾斜面上，所以视厚度或所量测的层厚可以与真实的层厚度不同。
Which of the following statements is true about the distance that the marble travels on the four types of surfaces?
下列哪项有关玻璃弹珠在上述四种表面移动的说明是正确？
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