Gaussian beam is the asymptotic solution of wave equation concentred at the central ray.

高斯束是波动方程在特定射线附近的高频渐近解。

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This penetrating view of the central region of the Eagle Nebula from Nasa's Chandra X-ray observatory reveals the incredible amount of star formation inside the iconic 'Pillars of Creation'.

这张有点透视效果的图是从美国宇航局的钱德拉X射线天文台获得的鹰状星云的中心地区，它揭示出传说中的“创作之柱”里包含着数量惊人的恒星。

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The supernova left behind a dense central core 12.5 miles wide that was first spotted in 1999 by NASA's Chandra X-ray Observatory.

超新星爆发后留下了一个直径12.5英里的致密核心，NASA的钱德拉X射线天文台于1999年第一次观察到了这一核心。

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The legality of the Arkansas adoption is likely to play a central role in this child ownership battle, according to Naomi Angell, a solicitor with London firm Goodman Ray, who specialise in family law.

BBC: Alan and Judith Kilshaw face investigation