howard rubel
霍华德·鲁贝尔
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"The reality is that space tourism is just not cost-effective right now--it's a limited market, and it's fraught with risk, " says aerospace-industry analyst Howard Rubel of Jefferies and Co.
FORBES: The New Space Race
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