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186,000

186,000

186,000

186,000

1

It travels at 186 , 000 miles per second and behaves as if it were both a solid particle and a wave of energy .

光速可达每秒钟 186,000 哩，而且光的传播不但是固体的粒子，又是一道能量。

3

By the end of the war , about 186 , 000 African American men had enlisted.

战争快退出时，已经征召约 186,000 位非裔美国人；

5

It was proved centuries ago that the speed of light is 186, 000 miles a second .

几世纪前就证实了光的速度为每秒 186,000 英里。

6

This calculation has since been verified , and proves that light travels about 186 , 000 miles a second .

这个结论后来经过了验证，证明光的运动速度是每秒 186,000 英里。

7

A light year is the distance which light travels at 186, 000 miles per second in one year, namely 6 million million miles.

1 光年是光以每秒 186,000 英里的速度在一年内走的距离即 6万亿英里

8

9

at 186 , 000 miles per second in one year , namely 6 million million miles .

1 光年是光以每秒 186,000 英里的速度在一年走的距离，即 6万亿英里。

10

If light or electricity travels at 186 , 000 miles per second , do you realise how quick those synapses are ?

如果光和电的速度是每秒 186000 英里，你能明白那些神经元的反应有多快吗？

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