photic zone

• 1. 透光区: photic zone | transparent area
• 2. 光谱透明区: spectrum transparency region

• 1.侧卫片见下肺野可疑卵圆形不透光区。
  Chest lateral shows suspicious ovoid opacity in lower lung zone.
  dict.yoduao.com
• 2.左股骨头塌陷，形态不规则，可见斑片状硬化区及软骨下透光区。
  The left femoral head has irregular contour, patchy sclerosis, and subchondral lucency, with collapse and fragmentation.
  dict.yoduao.com
• 3.沉积的薄膜介电常数约为2.0，在可见光区薄膜具有良好的透光性。
  The as-deposited film shows a dielectric constant as low as 2.0 and has high transparency in the visible light range.
  dict.yoduao.com

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