Scientists are also concerned that this announcement is a politically-motivated move in the new international race to the Moon.
最令航天业担忧的是钇供应紧张。钇是高温防护涂层中的关键成分，可防止发动机和涡轮在高温下“熔化”，一旦无法定期施涂相关涂层，发动机便无法正常服役。
，更多细节参见搜狗输入法2026
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Фото: Beata Zawrzel / NurPhoto via Getty Images