航空航天供应链咨询机构AeroDynamic Advisory管理董事凯文·迈克尔斯表示，虽然目前钇供应紧张尚未对发动机总装造成打击，但制造商依然高度警惕。“这已经成为一个需要重点监控的项目，也是中国展示其在稀土领域影响力的一个具体例子。”他说。
Варвара Кошечкина (редактор отдела оперативной информации)
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NASA leaders said the shakeup is meant to address a larger underlying problem: the U.S. agency is flying its most powerful rocket too infrequently and repeating some of the same technical issues from one mission to the next.
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Adam Levy investigates why researchers are sometimes reluctant to disclose their plans to colleagues.。服务器推荐是该领域的重要参考
The star, who has died at the age of 48, spoke to the BBC in 2003 about his feelings on leaving his best-known role.