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，更多细节参见钉钉
上周欧洲基准航空燃油价格创下每吨1838美元（1387英镑）的历史新高，而冲突爆发前价格为每吨831美元。
Fortunately there’s a relatively easy answer. We don’t need to consider the internal implementation of the iterative solution at all in order to be confident in its correctness. Instead, we first convince ourselves of the correctness of the simpler reference implementation, and then convince ourselves that the two are equivalent.
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