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  "dek": "美加两国贸易谈判在最后一刻破裂，据特朗普政府一名高级官员表示，美国将根据《1930年关税法》第338条，对价值约200亿美元的加拿大商品征收关税，有关措施将在当地时间8月22日午夜过后生效。据悉，双方均将谈判破裂归咎于对方。美国贸易代表格里尔表示，加拿大谈判代表在最后关头提出新要求，打破了双方经过数日谈判达成的平衡。而加拿大总理卡尼则表示是美国改变了立场。",
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