尽管贸易竞争和业务外包现象依旧存在，美国的制造业每年仍需替换掉成千上万退休劳工的劳动力。

Despite trade competition and outsourcing, American manufacturing still needs to replaces tens of thousands of retiring boomers every year.

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Aerojet公司将支持可替换弹头的集成和演示阶段，包括弹头制造以及与GMLRS集成，同样包括集成后的测试。

The company will support an alternative warhead (AW) integration and demonstration phase that includes the warhead fabrication and integration with the GMLRS as well as flight testing of the rocket.

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研究人员称，这项试验打开了一扇门，可以用人造dna完全替换细菌原有的遗传物质制造出人工生物体。

The experiment could open the door to production of artificial organisms whose original genetic material is replaced entirely by man-made DNA, the researchers said.

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