Fission reactors provide a lot of power for their size, which is a key attribute in designing space systems.
原子反应堆相对于自身的体积，提供了大量的能量，这将是设计太空系统的主要特性。
These abilities are key to discovering not only killer space rocks but huge Numbers of much more common phenomena, from planet-size bodies in our solar system to far-flung cosmic cataclysms.
这些性能是观测的关键，不仅可以发现致命的太空陨石也可以发现庞大数量的更加普遍的天文现象，从我们太阳系行星大小的物体到广泛遥远的宇宙大爆发。
It shows the size of the secret key space for each participant under the security level, provides the construction about authentication schemes for dynamic conferences.
说明了他们在某一安全水平下用户密钥空间的大小，并给出了前一类认证系统的具体构造。
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