World leaders started arriving in Washington yesterday for a showpiece summit at which Barack Obama will tackle the terrorist threat with a deal to secure all nuclear materials during the next four years.
世界各国领导人昨日开始抵达华盛顿参加令人瞩目的核安全峰会。巴拉克•奥巴马(Barack Obama)在会上将寻求达成一项协议,在今后四年期间保障所有核材料的安全,以对付恐怖主义威胁。
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