But the agencies argue that their ratings are designed to measure the probability of default, not to recommend the purchase of individual securities or to predict market prices.
但是信贷机构争辩说他们的评级只能衡量违约率的可能性，而并不对个别的证券提出买进的建议，也不能预测市场价格。
Taking the purchase of a deepwater self-elevating drilling rig as an example, a synthetic probability model is set up to carry out the economic risk assessment.
以某海洋钻井公司购置自升式深水钻井平台为例，建立了海洋平台购置项目经济风险评估的综合概率模型。
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