但是，现有的最好估计显示，只要我们分步骤地实施温室气体排放限制计划，它的成本便是适度的。

But the best available estimates suggest that the costs of an emissions-limitation program would be modest, as long as it's implemented gradually.

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在考虑数量的时候，我们最好能够对陶器特定生产地的总体产量和特定聚居地的总体消费做出一些估计。

When considering quantities, we would ideally like to have some estimates for overall production from particular sites of pottery manufacture and for overall consumption at specific settlements.

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计算机模型往往会给一个很好的明星大小的估计，但是直接测量将是最好的，研究人员说。

Computer models often give a very good estimate of star sizes, but direct measurements would be best, researchers said.

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