要不您如何计算零部件成本增长了多少，或者自动向有价值的客户提供限时折扣，或者计算追溯费用变更的影响？
How else are you going to calculate how much your parts costs have gone up, or automatically give a limited-time discount to a valued customer, or calculate the effect of a retroactive rate change?
而且这也将是全球第一次处理追溯过去很长一段时间的外部成本。
And it will be the first time the globe has tackled the question of externalities over a long time period.
尽管商业化的太阳能电池业务可以追溯到50年以前，但是太阳能板在成本的考量上依旧无法与生物能源相竞争。
Although the commercial solar-cell business dates back almost 50 years, solar panels still cannot compete with fossil fuels when it comes to generating electricity relatively cheaply.
如果标的太小，极少有受益人会为了道义上的原因通过法院来追溯，因为成本太高，所以就放弃了。
If the subject is too small, there are few beneficiary for moral reasons through the courts to back, because the cost is too high, so I gave up.
如果标的太小，极少有受益人会为了道义上的原因通过法院来追溯，因为成本太高，所以就放弃了。
If the subject is too small, there are few beneficiary for moral reasons through the courts to back, because the cost is too high, so I gave up.
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