The patient was lying upon a low bed covered with a soft woolen sheet.

病人躺在一张矮床上，身上盖着柔软的羊毛被单。

Many cases could be given of the lower beds of a formation having been upraised, denuded, submerged, and then re-covered by the upper beds of the same formation—facts, showing what wide, yet easily overlooked, intervals have occurred in its accumulation.

可以举出一个地层的下部地层被抬升、 剥蚀、淹没， 然后被同一地层的上部地层重新覆盖的许多案例— — 事实表明，在其积累过程中发生了多么宽阔但容易被忽视的间隔.