Experts say terrorist groups are seeking materials for a crude nuclear device - a so-called "dirty bomb" - that would have limited blast potential but could spread radiation in a major urban area.
VOA: standard.2010.04.11
It's basically just like agriculture like farming in urban area like city,
像在城市里的开发的那种农产业,
It's basically just like agriculture like farming in urban area like city,
像在城市里的开发的那种农产业,
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