minus ff

常见例句

雙語例句

• So Newton's Second Law tells me -Ff that mg sine alpha minus F f maximum =0 at this point is zero.
  根據牛頓第二定律,此時有mgsinα,最大。
• And minus Ff, the frictional force, which is the component uphill, and this is my equation number two.
  減去Ff，摩擦力，也就是滑坡曏上的力，這是第二個等式。
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