评级下调也可能是信用违约互换(CDS)等金融合同的触发事件，迫使资金易手。历史上，评级下调也曾令市场风声鹤唳。
Downgrades can also be trigger events in financial contracts, like credit default swaps, that force money to change hands between parties; and they have historically spooked markets.
巴特雷特树木专家公司，这个位于康涅狄格州的公司已有一百年历史，它与纽约、其他25个州以及加拿大、英格兰和爱尔兰都签有树木护理合同；
Bartlett Tree Experts, a century-old Connecticut-based company that has tree care contracts in New York, 25 other states, Canada, England and Ireland;
欧洲的天然气定价是有几十年历史的长期合同方式，合同价格和石油挂钩。
Gas prices in continental Europe are mainly set by a decades-old system of long-term contracts, linked to the price of oil.
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