Qt USES a system of groups and spacers to create a layout, and it takes a little effort to get your head around the principle.
Qt使用一个分组和间距器的系统来创建布局，但了解这个系统的使用原理需要花点功夫。
2
In principle, you might be able to use knowledge you have about data content or layout to code a clever look-up that's very fast.
从原则上说，您可使用已有的关于数据内容或布局的知识来编写一个可快速运行的巧妙的查询。
3
Based on the testing principle, a subaperture layout model was established with geometry optics theory, and the numerical solving method was provided in detail.