半深海区是微暗发亮的中央地域，因为它没有进行光合作用生产者。
The bathyal zone is the dimly lit middle zone, which because it has little sunlight does not contain photosynthesizing producers.
驾驶舱指示器系统的灯光可通过中央面板上的“灯光”开关来调暗或测试。
The flight compartment system indicator lights may be dimmed or tested by the use of a light switch located on the center instrument panel.
介绍了快速调出白光条纹的方法，分析了为什么白光干涉条纹的中央条纹有的是暗条纹，而有的却是亮条纹。
The text writes about the methods of quick adjusting the fringes of white beams and analyses the reason why some of the fringes of white beams in center are light fringes and some are dark fringes.
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