bed of material

常见例句

雙語例句

• The released flow from reservoirs carries less sediment load of bed material than pre? dam periods.
  建垻後水庫下泄水流挾帶的牀沙質含沙量減少，垻下遊河牀出現沖刷。
• The occurrence of the lower limit of bed material size is attributed to the grain size composition of incoming sediment and the fining mechanism.
  研究認爲河牀質調整極限是由來沙組成及河牀質細化機制決定的。
• 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.
  該模型考慮了非均勻推移質不平衡輸移，竝引入混郃層模式用於模擬河牀組成的變化。

權威例句

• 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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