“亮度”造句

天文学家能够测定每颗恒星的亮度。
An astronomer can determine the brightness of each star.

星星的光亮度各不相同.
Stars vary in brightness.

用18瓦的荧光灯灯泡有同样的亮度，而用电量却减少75％。
With an 18-watt fluorescent bulb you get as much light but use 75% less electricity.