opacity

n.

不透明性；费解；难懂；模糊

复数：opacities

1. Opacity is due to crazes in the resin.
   不透明是因树脂中产生裂纹。

Sympathy and phonological opacity
The World Price of Earnings Opacity
Radiative atomic Rosseland mean opacity tables
The Dust Content and Opacity of Actively Star-Forming Galaxies
Spin-orbit interaction effects on the Rosseland mean opacity
Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
Persistent pulmonary nodular ground-glass opacity at thin-section CT: histopathologic comparisons.
Line formation in solar granulation: V. Missing UV-opacity and the photospheric Be abundance
Mars Global Surveyor Thermal Emission Spectrometer (TES) observations of dust opacity during aerobraking and science phasing
Extragalactic optical-infrared background radiation, its time evolution and the cosmic photon-photon opacity