design flaw 设计缺陷

It might seem like a design flaw to have something on a window that could potentially obscure your view whilst driving, but when it comes to cold weather, the lines on the back window are actually what's keeping the view as clear as possible.

窗户上的东西可能会在驾驶时遮挡您的视野，这似乎是一个设计缺陷，但当涉及到寒冷的天气时，后窗上的线条实际上是保持尽可能清晰的东西。