And space industry analysts think costs could go lower still.
而航天业分析师认为，成本还会不断下降。
One reason space engineers are notoriously conservative is that the costs of failure are high.
太空工程师出了名的保守一个原因是失败的代价太高。
One reason space engineers are notoriously conservative is that the costs of failure are high.
太空工程师出了名的保守一个原因是失败的代价太高。
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