One day these are multimillion-dollar war machines and the next they are museum pieces.
这些如今价值数百万美元的战争武器,明天就会进入历史的博物馆。
Pilots can fly above a war zone and drop thousands of small wireless sensors, the size of a small pebble and costing a dollar apiece, over the terrain.
飞行员可以在战区上空飞行,在地面上扔下数千个小型无线传感器,每个传感器只有一块小鹅卵石大小,价格为1美元。
On the eve of the first world war, Eichengreen shows, the Dutch guilder, Belgian franc and Austrian schilling were all more important as reserve currencies than the dollar.
埃森格林指出,第一次世界大战爆发前夕,荷兰盾、比利时法郎和奥地利先令都是比美元更重要的储备货币。
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