他们帮助军队协调行动和进攻。
他们不得不凭借唯一的动力把它们发动起来，并使之协调行动。
These they have to bring into play by means of a single motive power, and cause to act in concert.
麦克.穆萨曾经在国际货币基金组织担任首席经济学家。 他指出，世界主要经济体通过协调行动削减利率已经表明他们有能力相互合作。
Mike Mussa, a former chief economist at the International Monetary Fund, says through interest rate cuts the major economies have already demonstrated their capacity to act cooperatively.
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