This is a virtual keyboard with laser impressions on any table or other surface.
这是一个可以在任何桌面或其他表面投射激光的虚拟键盘。
2
If the water table intersect the land surface, groundwater will flow out onto the surface at springs, whether to be collected there or to subsequently flow farther along a drainage.
如果地下水位与地表相交，地下水将在泉水处流出地表，聚集于此或是随后沿着排水系统进一步流动。
3
In some cases, the water table reaches Earth's surface, where it is expressed as rivers, lakes and marshes.