Quadtree-based image compression formats and level-of-detail systems all work this way. Satellite imagery, terrain rendering, and geographic information systems use quadtree decomposition to serve data at varying resolutions: zoomed out, you see large coarse blocks; zoomed in, you see fine-grained tiles. The same principle extends to three dimensions (octrees) for volume rendering and 3D spatial indexing.
Мощный удар Израиля по Ирану попал на видео09:41
。爱思助手下载最新版本对此有专业解读
5年过渡期的设立，是减贫实践的制度创新，目的是保持帮扶政策的总体稳定。
Naomi Clarke,BBC Newsbeat
Strong facial expressions are on show on set