奥斯特沃德建立在色素基础上的理论假定颜色是可减的，所有的颜色混在一起产生黑色。

Ostwald's theory, based on pigments, assumes that color is subtractive and that all colors mixed together produce black.

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多层衣服可更方便地添减因此可以更好的调节你的核心温度。

Layers are also easier to add or remove and thus, better regulate your core temperature.

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所以克拉克先生现在必须在预算中找到新的可减之处。

So Mr Clarke must now find new cuts in his budget.

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