Boeing said in a statement it will work closely with supplier Rolls-Royce to expedite the engine deliveries while other flight testing across the fleet continues.

波音公司在一份声明中称，在其他飞行试验继续进行期间，公司将和发动机供应商劳斯莱斯公司紧密合作，加快发动机的交货时间。

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Proof, though, will come with use. Testing is already under way, with the nanocrystalline nickel-tungsten alloy being tried out as a plating on the bumpers of a fleet of trucks.

尽管样品将被使用，但测验仍在进行，一队卡车保险杠上的纳米结晶镍钨合金镀层仍在接受检验。

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Google is testing a fleet of plug-in hybrids and software that would turn them into load-balancing tools for utilities flooded with variable power from wind and solar generators.

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Google has adroitly developed its technology, burnished its brand and captured public imagination with extensive road testing of its driverless fleet.

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Iran is fanning those fires, testing longer-range missiles and threatening to sink the U.S. Fifth Fleet in the Gulf.

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