Refraction—the bending of light as it passes through different media—has long been constrained by physical laws that prevent ...

Question 您好！ “Casual、random” 和 “arbitrary” 都有 “任意的，随意的” 意思，请问这三个单词有什么不同的用法和区别？ 非常感谢！ Jiaying 这位网友想知道三个词之间有哪些区别。 “Casual、random” 和 “arbitrary” 都有 “随意的” 意思，但它们的用法不完全相同。

Charter Schools’ Arbitrary Rules Can Have Dire Consequences Marilyn Anderson Rhames, an educator at a charter school in Chicago, is the author of the Education Week Teacher blog “Charting My ...