bed of material

常见例句

双语例句

• The released flow from reservoirs carries less sediment load of bed material than pre? dam periods.
  建坝后水库下泄水流挟带的床沙质含沙量减少，坝下游河床出现冲刷。
• The occurrence of the lower limit of bed material size is attributed to the grain size composition of incoming sediment and the fining mechanism.
  研究认为河床质调整极限是由来沙组成及河床质细化机制决定的。
• This model takes into account non-equilibrium transport of non-uniform bedload and introduces the mixed layer model to calculate the changes of bed material grain class.
  该模型考虑了非均匀推移质不平衡输移，并引入混合层模式用于模拟河床组成的变化。

权威例句

• Opportunity has been trundling around Mars ever since, though it was designed for only a ninety-day mission. (Spirit got stuck in a sand trap in 2009 and quit transmitting nearly a year later.) It never found the lake bed, or organic material of any kind.
  NEWYORKER: The Martian Chroniclers
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