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。
Created in 1979, the VDPS currently offers a one-off tax-free payment of £120,000 if it is medically proven that, on the balance of probability, a vaccine has caused severe disabilities.
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A skeleton of the alvarezsauroid Alnashetri cerropoliciensis—representing a highly complete alvarezsauroid skeleton from South America—provides evidence on the evolution of the peculiar anatomy and miniaturization within this unusual theropod dinosaur clade.，详情可参考爱思助手下载最新版本
安德烈·塔可夫斯基（左）、娜塔莉亚·邦达尔丘克（中，饰哈丽）和尤里·亚尔韦特（饰斯纳乌特）在《飞向太空》拍摄现场 图/《殉道学：塔可夫斯基日记 1970-1986》