将快门速度调至 1/8000-非常少的进光量.
Set shutter speed to 1/8000 - very little light gets through.
对天体物理分析来说，可接收到的天体光量是相当小的。
The amount of light available for astrophysical analysis are usually so small.
玻璃对不同颜色的光的折射量不同。
Glass bends light of different colours by different amounts.
巴黎，这座城市的光及其周围地区之一，访问量最大的地区。
Paris, the city of light and its surroundings are one of the most visited areas.
光暗交替条件下产孢量最大。
Alternation of light and dark could promote the spore production.
光暗交替条件下产孢量最大。
Alternation of light and dark could promote the spore production.
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