b a is much less than 中文意思是什麼

b a is much less than 解釋
遠小於
  • b :
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時,冠以不定冠詞主要表示類...
  • is : be 的第三人稱,單數,現在時,陳述語氣。
  • much : adj (more; most) 〈用於修飾不可數名詞〉很多的 許多的;大量的;很大程度的;(時間)長的(much wa...
  • less : adj 〈little 的比較級之一〉1 更小的,較小的,更少的,較少的。2 較次的,較劣的,較不重要的;身分較...
  • than : 1 比〈用於 than whom than which〉。 Here is my new teacher than whom a better does not exist 這就...
  1. When catchment area, average channel gradient and catchment shape factor of designed culvert or bridge are known, a user can be convenient to get local parameters c, e and b from standard contour charts and easy to calculate flood flow just by a calculator. design period of flood flow is enormously shortened as well as a high precision. estimated flood flow through culvert or small bridge by new calculation model is generally less than by traditional methods, so that much cost is cut down a s reducing the span of culvert or small bridge

    以75000km ~ 2的川中丘陵地區為試點研究區,繪制了該地區新模型的參數等值線圖,率定了不同設計頻率的改正系數,使設計者只需在地形圖上獲取集水面積,河道平均坡降和流域形狀系數,在參數等值線圖上查得橋涵所在地的相應參數,使用計算器即可迅速計算出設計流量,大大縮短了設計周期,且精度較高,設計的洪水流量一般低於傳統方法,從而可減小橋涵跨徑,節省投資。
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