The paging UI allows you to navigate backwards and forwards through displayed data, displaying a fixed number of records at a time.
该分页 UI 使您能够在所显示的数据之间向前和向后导航，并且一次显示固定数量的记录。
Together they illustrate the importance of understanding the lifecycle -- backwards, forwards, and inside out -- so that you can manipulate it when you need to.
The single door hinges forwards and upwards, so such cars can be parked facing the pavement and close together—indeed, three of them can sit abreast in a standard parking place.
