为了解决这个问题,我们可以使用弱表(weak table),这样,不用的结果最后就会从表中删除。 借助于高阶函数(higher-order functions),我们可以定义一个通用的记忆化函数:
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美联储星期二发表的声明说,从上一次,也就是10月底的会议以来,美国经济前景进一步走弱。
In its statement, the Fed said that the economic outlook has weakened further since the committee's last meeting in late October.
美国通胀数据弱于预期,进一步支持美联储扩大资产负债表以防止通缩的做法。这样的环境导致纽约时段美元走软。
The dollar softened as inflation data came in weaker than expected, further supporting the Fed's decision to expand its balance sheet in an effort to prevent deflation.
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