The deadly shooting comes at a time of increased tension between the two countries.
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At this point, I think most English speakers can follow this passage, if not understand the finer points. I imagine some more vocabulary like "hine" may reveal itself to you purely through context.。关于这个话题，heLLoword翻译官方下载提供了深入分析
The background radiation from cosmic rays increases with altitude, from 0.3 mSv per year for sea-level areas to 1.0 mSv per year for higher-altitude cities, so for best results use this on a plane or in outer space