It is known to all that light travels in straight lines. 怎么改成强调句
问题描述：
It is known to all that light travels in straight lines. 怎么改成强调句
答
It is known to all that light travels in straight lines（众所周知,光以直线传播）
强调句：As is known to all, light travels in straight lines only
答
那是Light travels in straight lines is known to all.的强调句。
答
=3= It is...that..已经是强调句啦...
是Light travels in straight lines is known to all.的强调句.
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答
已经是强调句了