"So, a single Falcon 9 rocket has about 30kg, so this is quite a lot more," he says.
在半导体领域，钪的紧缺同样令人忧心。研究机构SemiAnalysis创始人兼首席执行官迪伦·帕特尔指出，美国芯片制造商的钪库存正在走低，这可能危及新一代5G芯片的生产。
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On Friday, the BBC said: "Shortly in advance of a hearing (due 16 February), Mr Wallace discontinued his claim. He is not receiving any payment in costs or damages from either BBC or BBC Studios."