For any machine whose input force and output force are known, its advantage can be calculated.

任何机器，若已知其输入力和输出力，则可求出其机械效益。

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For any machine whose input force and output force are known, its mechanicaladvantage and be calculated.

如何机器，若已知其输入力和输出力，则可以求出其机械效益。

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Constant-force-output mechanisms produce a constant output force for a range of input displacements.

定常力输出机构就是在一定的输入范围内输出一恒定力的机构。

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Shortly prior to its ceasefire announcement MEND had carried out its boldest attack against Nigeria's oil installations since it launched its campaign of violence in late 2005, when an attack on Shell's Bongo facility, 120km out to sea, forced the Anglo-Dutch major temporarily to halt production equivalent to about 10% of Nigeria's output, and to declare force majeure.

ECONOMIST: A big rebel group in the Niger Delta calls off its ceasefire

And in the long run later retirement and other reforms will expand the labour force and thus potential output, whereas higher taxes dull incentives to work and invest.

ECONOMIST: America's budget deficit

After a decade of turbo-charged growth, output will necessarily decelerate, as the labor force approaches full employment and inflation forces the hand of President Dilma Rousseff. (Read Brazil: A Bubble In Labor Markets?).

FORBES: A Soft Landing For Brazil As Output Slows And Growth Centers On Middle Class