只要所有垂直面在一条线上，图案看起来就会很整齐。As long as the verticals align, the design will look regular.可确信光线仅在垂直面内作曲线传播.Light can be trusted to curve only in a vertical plane.即使承受力,通常反力还是在垂直面内维持固定不变.A reaction generally remains fixed in e...

“垂直面”的英语可以翻译为：vertical plane，vertical ...