试题题干
Translate the following sentence into Chinese.
We can show that the laws of physics have remained unchanged through 15 billion light-years.
参考答案
试题解析
考点：the laws of physics 物理定律；remain unchanged 保持不变；light-year 光年。
句子结构：句子主干为We can show，that引导宾语从句解释show的具体内容。