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1.The threat of extremist groups demonstrating at statehouses across the U.S. prompted some governors to ramp up security on Sunday.
extremist 极端主义者
A previously unknown extremist group has said it carried out Friday's bomb attack.
一个先前未知的极端分子组织声称其实施了周五的炸弹袭击。
2.The threat of extremist groups demonstrating at statehouses across the U.S. prompted some governors to ramp up security on Sunday.
security 安全
She hasn't been cleared by security.
她尚未获保安部门批准做机要工作。
