In particularly wet years, short stretches of an otherwise dry stream-bed may have flowing water because the water table rises to intersect the land surface.

在气候特别湿润的年月里，平常干涸的河床下游可能会有水流动，因为地下水在那里位抬升到了地表以上。

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By day, the bed is stored on the ceiling, the under-surface becomes ceiling with the possibility of integrating lighting.

白天，床储藏在天花板中，床的底部还可以成为带照明设备的天花板。

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Obviously armoring layer existed in the surface of the river bed.

河床表面具有明显的粗化层。

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In an effort to mimic the soft exterior of a real bed, Mr. Fischer coated one of the bed sculptures with white paint but then interrupted the smooth surface by pouring a pile of real concrete over it, weighing down one side of the sculpture's surface.

WSJ: Urs Fischer's Beds & Problem Paintings Show in Beverly Hills

Water hyacinth grows into a thick bed of waxy leaves and violet flowers that cover the surface of the lake.

CNN: Flower power threatens Kenya's Lake Victoria