But questions remain about how realistic the goal and timeframe are, given recent and steep Nasa budget cuts, and some scientists are concerned that the plans are driven by geopolitical goals.
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毕竟，IPO或融资也只能缓解企业一时的压力，与其急于一时，不如先验证商业模式的稳定性，才是企业长期生存的底气。
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