这类风险可以是如此复杂以至于银行雇佣数学家们去评估它们。
The risks can be so complex that banks hire mathematicians to assess them.
评估形势可能很复杂。
观察性评估技术已经变得更加复杂，它减少了刚刚提出的限制。
Observational assessment techniques have become much more sophisticated, reducing the limitations just presented.
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