PET系统的硬件主要包括机架、环形探测器、符合电路、检查床及计算机工作站等。

The system hardware include gantry, detector, coincidence circuit, patient table and computer workstation.

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但LCROSS探测器(全称为月球环形山观测和遥感卫星)的这项任务有可能最终会在空间探索领域中具有同样深远的影响。

But the LCROSS (Lunar Crater Observation and Sensing Satellite) mission could eventually have a similarly dramatic impact on space exploration.

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随着一级空火箭和一个月球探测器分别撞击到月球表面不同的两座环形山上，美国航空航天局（NASA）的大型“双重撞月”行动在今天早晨取得了成功。

NASA's double sledgehammer shot to the moon succeeded early this morning when an empty rocket stage and a lunar probe each crashed into separate craters.

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