例句與造句

1. Taking the example of a current high definition ( HD ) video system, with 1920 by 1080 pixels, the Nyquist theorem states that it should be possible, in a perfect system, to resolve fully ( with true black to white transitions ) a total of 1920 black and white alternating lines combined, otherwise referred to as a spatial frequency of 1920 / 2 = 960 line pairs per picture width, or 960 cycles per picture width, ( definitions in terms of cycles per unit angle or per mm are also possible but generally less clear when dealing with cameras and more appropriate to telescopes etc . ).
2. It's difficult to find unit angle in a sentence. 用unit angle造句挺難的