虽然传统老式的银幕只有一个1.85：1的纵横比，但是将稍宽的4K电影文件通过被硬塞进脚本方式至于纵横比为1.77：1图片格式的电视播放出来并没有太大的困难。
While conventional cinema screens have an aspect ratio of 1.85-to-one, the slightly wider 4k movie format can be shoe-horned into television's 1.77-to-one picture frame without too much difficulty.
针对面齿轮硬齿面磨削加工中存在的困难，提出用蜗杆砂轮磨削的双参数法来磨削面齿轮。
Using a helical involute pinion surface to form the grinding worm surface, a helical face gear is formed via a two-parameter worm envelope.
超硬砂轮修整的困难，是生产上推广应用的主要障碍之一。
The difficulty of dressing superhard wheel is one of the main obstruction to popularize application in industry.
越硬的物料制砂起来越困难，而且对设备的磨损越严重。
The more hard material made up more difficult, and sand on equipment wear the more serious.
针对面齿轮硬齿面磨削加工中存在的困难，提出用蜗杆砂轮磨削的双参数法来磨削面齿轮。
Grinding gear with the toroidal involute interior thread worm grind wheel is a new kind of process in hard surface gear finish machining.
针对面齿轮硬齿面磨削加工中存在的困难，提出用蜗杆砂轮磨削的双参数法来磨削面齿轮。
Grinding gear with the toroidal involute interior thread worm grind wheel is a new kind of process in hard surface gear finish machining.
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