It is held there by the force of surface tension without which water would drain instantly from any wet surface, leaving it totally dry.

它是由表面张力的力量保持的，没有它，水会立即从任何潮湿的表面流失，使它完全干燥。

youdao

That can include beams, posts, drain lines, water piping or surface-mounted wires.

包括横梁、柱子、排水管道、供水管道或表面贴装线。

youdao

In a minute the whirl extends from surface to drain, animating the whole basin.

不一会儿，漩涡从水面扩展到槽底，带动了整个水槽里的水。

youdao

There are some systems that actually will take a circle and drop it just below the surface of the water and have the oil kind of flow into it, almost like a drain, recover it and pump it out.

WHITEHOUSE: Daily Press Briefing