Height=0 means that the height of the light on this surface is zero, that is, the light passes through the center of the aperture, which is the central light. pupil zone=1 represents the light passing through the edge of the diaphragm aperture, that is, the full aperture light. It stands for width, height and length, which is the abbreviation of English words (w) width: width (h) height: height (d) depth: depth. The length, width and height are printed on the carton. The English abbreviation of length, width and height is a very basic and practical English word that is often encountered in daily life. The meaning of W*d*h specifications: width *depth* height are width * depth * height respectively. w is the abbreviation of width, which means width; d is the abbreviation of depth, which means depth; h is the abbreviation of hight, which means height. General length.
An Appreciation of Diane Keaton's Singular Personal Style Diane
Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism. ①They looked down from a giddy height. (They looked down from a dizzying height.) ②His height makes him stand out in the crowd. (He is tall, so he stands out in the crowd.).
