他经历了周期性的变化。
白色沙质土壤上的森林最容易发生永久性的变化。
Forests on white, sandy soil are most susceptible to permanent alteration.
过去几十年里,饭盒的样式经历了一场革命性的变化。
The last few decades have brought a new lunch box revolution, of sorts.
I'm now exploring the question of whether or not stock prices are indeed memoryless, or the stock changes.
我现在要探索一个问题那就是股价,是否真的是无记忆的,或者说股票的变化是否是无记忆性的。
These are long-term government bonds and I--now these are--since they're long-term, they have some uncertainty and variability to them.
这些是长期政府债券,由于它们是长期的,就存在不确定性和变化性。
It's well insulated. Heat is not going in or out adiabatic. q is equal to zero.
绝热性很好,热量不会变化,是绝热的,Q等于零。
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