大师作文网请英语达人帮帮忙! 求这一段话的paraphrase
来源：学生作业帮 编辑：大师作文网作业帮 分类：英语作业 时间：2024/11/10 20:42:23
请英语达人帮帮忙! 求这一段话的paraphrase
The speed at which light travels varies depending on the substances through which it is passing; light travels more slowly when it passes through a denser substance. Refraction occurs when the direction in which light is moving changes as it passes at an oblique angle from on substance(medium) to another of a different density (for instance, between water and air, or air and glass). This is caused by a change in the speed of light as it passes across the boundary between the two media.
The speed at which light travels varies depending on the substances through which it is passing; light travels more slowly when it passes through a denser substance. Refraction occurs when the direction in which light is moving changes as it passes at an oblique angle from on substance(medium) to another of a different density (for instance, between water and air, or air and glass). This is caused by a change in the speed of light as it passes across the boundary between the two media.
光的速度随物质通过是通过更慢,光时气流通过致密物质.时发生折射光的方向移动时变化在倾斜从物质(中)到另一个不同的密度(例如,在水和空气,或空气、玻璃).这是由于改变光的速度是在经过两个媒体之间的界限
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