太阳放出光。
But even the brightest city in America, Las Vegas, emits only about a ten-thousandth as much light as the sun shines upon the same area.
但即使是美国最亮的城市拉斯维加斯，其发出的亮度也仅只及太阳光在这块区域反射亮度的万分之一。
How much light the sun emits affects the Earth's weather and climate.
太阳光对地球的天气和气候有多大影响？
While it emits no light, this dark matter far outweighs the Milky Way's hundreds of billions of stars, giving the galaxy a total mass one to two trillion times that of the sun.
这种黑物质不发光，但它远远重于银河系数以亿计的恒星，使银河系的总质量达到太阳的一至二万亿倍。
The autumn sun like covered with orange red lampshade, emits soft light, light up the body, face, warm.
深秋的太阳像被罩上橘红色灯罩，放射出柔和的光线，照得身上、脸上，暖烘烘的。
The sun's activity waxes and wanes on an 11-year cycle, and over this cycle the amount of ultraviolet light the sun emits changes a lot more than does the total amount of energy.
太阳活动的盛衰以11年为一个周期，在一个周期内，太阳放射的紫外线的变化幅度要比其放射的能量的变化幅度要大得多。
The sun's activity waxes and wanes on an 11-year cycle, and over this cycle the amount of ultraviolet (UV) light the sun emits changes a lot more than does the total amount of energy.
太阳活动的盛衰以11年为一个周期，在一个周期内，太阳放射的紫外线的变化幅度要比其放射的能量的变化幅度要大得多。
The sun's activity waxes and wanes on an 11-year cycle, and over this cycle the amount of ultraviolet (UV) light the sun emits changes a lot more than does the total amount of energy.
太阳活动的盛衰以11年为一个周期，在一个周期内，太阳放射的紫外线的变化幅度要比其放射的能量的变化幅度要大得多。
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