这些行星运动的变化，导致了气候的变化。

These changes in the planet's motions, they caused the climate to change.

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在这个传递和反射的过程中，声音发生了变化，回声的变化使蝙蝠能够感知到目标的特征。

In this process of transmission and reflection, the sounds are changed, and the changes in the echoes enable the bat to perceive features of the target.

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房子总是在变化，以满足变化中的需求。

The house is always changing to meet changing needs.

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So that's a big help. And equilibrium happens when there isn't any possible change of state that would satisfy this.

这个非常方便，当所有的变化,都无法满足这个公式的时候,系统就达到了平衡。

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If you were to make that change you would find that the molecule now has completely different biological and chemical properties.

如果要做出这样的变化,你会发现,分子的生物形状,和化学性质完全改变了。

麻省理工公开课 - 化学原理课程节选

That can happen but that's abnormal, but changes in maybe the chemistry of the backbone that holds the nucleotides together.

这可能发生的,但属于非正常的变化,而是改变诸如维持核苷酸序列的,主链的化学结构

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