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。
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16歲時，她被告知自己無法懷孕生子。，更多细节参见服务器推荐
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Heavy deluges and saturated soils have the potential to cause significant damage to homes, transport infrastructure and food supply.