The third member of the Great Observatory family, the Chandra X-Ray Observatory (CXO), was deployed from a Space Shuttle and boosted into a high-Earth orbit in July 1999.

钱德拉X射线天文台，排行老三。 1999年7月哥伦比亚号航天飞机搭载升空，运行在高地球轨道上。

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Upgrading from the 2.x branch to the 3.x version is pretty easy. This also holds true with upgrading within the 3.x family.

从2.x升级到3.x非常简单，在3.x不同版本中升级也是如此。

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A radio wave is of the same family as heat waves, light waves, X-rays and gamma rays.

无线电波与热波、光波、X射线和伽马射线一样都属于同一族系。

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The subscription service offers instant access to current and past seasons of shows like 30 Rock, Modern Family, The X-Files, Arrested Development and Family Guy.

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The federal Title X Family Planning program, enacted in 1970, provides contraceptive services and preventative health care.

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And then, in the 17th, the genuine greatness started, under the direction of Pope Innocent X of the prestigious Pamphili family.

WSJ: Rome's Piazza Navona: Perfection, Squared | Masterpiece by Willard Spiegelman