Speaking in Barcelona, Artur Runge-Metzger, the European commission's chief negotiator, said: "it is a Catch-22 situation."

欧洲委员会的首席谈判代表阿图尔·龙格梅茨格在巴塞罗那说：“这是一个两难的局面。”

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Metzger and colleagues have used similar measures to model how a rocket plume could scatter dust and boulders in the low-gravity environment of the moon, threatening nearby lunar outposts.

Metzger和他的同事运用类似的手段去为在月球低重力环境下月球基地附近的浮尘和巨石对火箭升空的影响建模。

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CNN's Adam Reiss, Ted Metzger, Raelyn Johnson, Joe Johns and Michael Martinez contributed to this report.

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"We were not looking at ECD as a financial entity or as a company, " Metzger says.

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Ian Metzger says they look forward to their first official showcase for SXSW in March.

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