波音做错了什么?
Boeing and Airbus could stick with their existing products, steadily squeezing out improvements. Or they could do something more ambitious.
空客与波音可以死守现有产品并一点一点的改进,它们也可步子迈得快些。
Repeated delays to the introduction of new Boeing and Airbus models do not help, either.
波音和空客新型飞机推出的一再延迟也对劳斯莱斯的利润产生负面的影响。
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