natural bed meaning in English

河床；自然层
天然层
天然底盘
天然河床
自然层

There are three natural beds like natural bathtubs beside the pond . come on , wash the troubles away and keep healthy and young
水潭边有三层天然的石床，俨然是一个天然的浴池。来，洗去烦恼，留下健康与长寿。
A water power generating facility makes use of the energy difference between two different levels of flowing water by transferring the water from natural bed of the stream at the higher level to the bed at the lower level and effectively extracting its potential energy , which is then made available at the rotor shaft for further use
通过利用河流中不同水位之间的能量来驱动螺旋泵的转轴，在将高水位的水流输送到低水位的过程中汲取水流中储存的能量，将其转化成电能。