它是一个值一个恒量。
太阳系的结构统治着我们的生活，这体现在我们对时间的恒量和季节变化的体验当中。
The structure of the solar systemgovens our life, because is the means by which we measure time and experiencethe changing seasons.
权衡量相对未来恒量是折现。
Thetrade-off amount is a discount against the future constant.
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