“弩”怎么读？

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亚历山大的工兵修建了浮动的筏子来运载沉重的弩炮.Alexander's engineers built floating rafts for the heavy catapults.世界在冷战中剑拨弩张.The world lives at daggers drawn in a cold war.双方剑拨弩张.The knives are out on both sides....