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4 K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.
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