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It's simple, Peppa. Concaved surfaces reflect the light waves inversely to their origin, and… Is it magic? Yes, it's magic.
这很简单，佩奇，弯曲的表明会反射光线，使它与原有的路径相反...是有魔法吗？是的，这是魔法。
《Peppa Pig Season 4》《小猪佩奇 第四季》
双语例句
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Based on this, the design concept and design parameters for the mid-concaved profiles with corrected involute of high precision gear hobs were made definite.
明确了高精度透平齿轮滚刀所采用的修缘渐开线中凹齿形的设计思想和设计参数。