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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He said he would examine the evidence "thoroughly" ahead of his final decision in March 2026.
炒股想赚钱要先学什么？认错。这条视频我想复盘一下我2025年炒股的思路，分析一下在低频次出手的情况下，如何在机构和趋势股上赚钱，同时也想根据同学、朋友亏钱的操作来聊聊普通股民如何减少在股市里亏钱，选择更适合自己的思路。