punctuated equilibrium的用法和样例：

例句

Gaps in the fossil record have led some paleontologists to propose the punctuated equilibrium theory of evolution.化石证据上的断代使古生物学家们提出间断平衡进化理论。
It has been argued that this anticipated the punctuated equilibrium hypothesis, but other scholars have preferred to emphasise Darwin's commitment to gradualism.有人认为这加快了间断平衡假说的发展，但其他学者倾向于强调这表明了达尔文对渐进论的信奉。

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a posteriori estimate

abstract model theory

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