Since the speed of light is about a million times as great as that of sound waves, the reflection of light waves may very well be applied in detecting a target and its distance.
光速大约为声速的100万倍，因此光波的反射现象可以有效地用来探测目标物及其距离。
2
By integrating historic film material with contemporary images this filmic poem continues the timeless reflection of East and West in images, words and sound.
通过把历史电影素材和当代图像结合起来，这部电影诗歌继续用图像、文字和声音进行关于东西方的永恒思考。
3
This however will ultimately only be a reflection of behavior that is associated with the sound of music played within the field of each human and upon the land in the cities.