需要找到将不确定性量化的方法。
不过，由无法量化证券购买的影响所引起的不确定性，增加了政策微调和政策沟通上的困难。
However, uncertainty about the quantitative effect of securities purchases increases the difficulty of calibrating and communicating policy responses.
此外，每月要支付的账单是一目了然的，但将来有个更好职业前景所带来的利益却不好量化，而且也不确定。
What's more, monthly payments are precise, while the numbers attached to a better career in the future are vague and uncertain.
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