In HTML terms, a grid is a "super-table" with its own scrollable viewport.
在 HTML 中，一个网格是一个 “超级表”，拥有自己的可滚动视图端口。
2
Figure 8 shows how the sidebar background widens as the browser viewport is changed from narrow to wide.
图8显示边栏背景的宽度如何随着浏览器窗口由窄变宽。
3
Beginning on the GDI mapping mode, the paper discusses the concepts, meaning and relation of viewport based on logic coordinates and window based on device coordinates.