But the principle of focusing rays through an aperture onto a two-dimensional surface remains the same.

但其原理通过孔径聚焦光线在一个二维表面是保持不变的。

youdao

Cleaning and disinfecting things like desks and doorknobs can play a role in protecting us, he says, but 'focusing on one surface misses the point, because no surface is not germy.'

他说，清洁并为桌子和门把手等物体进行消毒在保护我们也发挥著作用，不过只专注于一个表面就错了，原因是任何表面都有细菌。

youdao

By focusing a circle of light on the cornea and measuring its reflection, it is possible to determine the exact curvature of the cornea's surface.

通过将一束圆形光圈聚焦在角膜上，测量反射过来的光线，就能得出角膜表面曲率的确切数据。

youdao

Microsoft has been tailoring its Internet Explorer browser for touch, focusing on making it responsive and fast for tablets like its Surface.

WSJ: Web Browsers Are Reinvented