A hydraulic step cylinder system (HSCS) used as a new kind of nuclearcontrol rod driving system is driven by dynamic pressure.
水力步进缸系统是以流体动压为动力的反应堆新型控制棒驱动装置。
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Japan has been trying to bring its nuclear crisis under control, but the spread of radiation has raised concerns about the safety of the nuclear energy.
日本一直在努力控制核危机，但是核辐射的蔓延已经引起了人们对核安全的担忧。
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The United States and Russia have reached a deal on their most extensive nuclear arms-control agreement in nearly two decades, the Kremlin announced Wednesday.