Messenger will become the first spacecraft to orbit Mercury and the first mission there since Mariner 10 in 1975.

“信使”号将成为第一个绕水星飞行的航天器，它也是1975年“水手10号”接近水星后的第一次近水星探测活动。

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NASA's Mercury probe Messenger has become the first spacecraft to go into orbit around the closest planet to the Sun.

美国国家航空航天局(NASA)的信使号水星探测器成为有史以来第一个到达水星轨道的空间飞行器。

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Messenger is the first spacecraft to go into orbit around the planet.

信使号探测器是第一进入行星轨道的航天器。

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This public humiliation is not the first time that an imperfect messenger has been discredited entirely because of unethical behavior.

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Some young Chinese have registered Live Messenger for the first time as an alternative to logging on to QQ and finding themselves without anyone to talk to.

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Now Facebook is not the first to roll such an offering out and this voice calling through Messenger is not the only way Facebook is challenging carrier voice revenue.

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