S-STAR是具超镜面性、高硬度和耐腐蚀的马氏体型不锈塑料模具钢,经特殊熔炼而成,其化学成分为0.38C-0.9Si-13.5Cr-0.1Mo-0.3V,其交货硬度可在≤229HB下或在(30~34)HRC预硬状态下。
S: when did you start to have the dream of becoming a pop star?
S:你是什么时候开始有明星梦的?
So this is the 1 s star, sigma 1 s star orbital, and what you have in the center here is a node, right in the center between the two nuclei.
这是1s星,sigma1s星轨道,中间这个是节点,它在两个原子核中间。
The sharp Hubble data also reveal more distant background galaxies seen right through NGC 2442's star clusters and nebulae.
敏锐的哈勃数据还暴露了更多遥远的背景星系,右边透过NGC 2442的星团和星云可见。
Professor Geraghty says that "Star Trek's" message of hope,community, and self-improvement are central to American culture,history and identity.
VOA: special.2009.06.05
She's a flower, she's perishable, she's half hidden, - and she's ultimately dead and in the ground-- whereas a star would seem to be something that she just can't be mapped onto if she is this half-hidden thing.
她是一朵花,是易腐烂的,有一半深埋在土里,最终凋谢回归土地-,如果她一般在土里,她就不可能是星星。
Then,many years later, on March third,nineteen thirty-one, "The Star-Spangled Banner" officially became America's national anthem.
VOA: special.2011.03.07
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