There have been six earthquakes with at least magnitude 6 or greater in historical times, including a 7.5 magnitude quake that struck just outside the northwest boundary of the park in 1959.

有历史记载以来，那儿至少6级或6级以上的地震已经有了六次，包括正好侵袭了黄石公园西北边界外边的1959年发生的7.5级地震。

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The stress and deformation of crankshaft are calculated by finite element method with six load boundary conditions and three displacement boundary conditions.

分别采用六种载荷边界条件和三种位移边界条件对曲轴应力和变形进行了有限元分析；

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The six-vertex model with open boundary conditions is discussed. The correlation functions for the model are calculated and expressed as some determinants.

讨论了具有开边界六顶角模型的关联函数，计算了涉及边界自发极化的边界关联函数，得到了它们的行列式表示。

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It matters: the difference between a boundary four and a boundary six can be the margin of victory in a tight one-day game.

ECONOMIST: Ringing the changes

This was the Precambrian-Cambrian boundary, six hundred million years old.

NEWYORKER: The Martian Chroniclers

New batsmen Pettini went on the offensive as the day drew to a close, hitting Boje for six over the long-off boundary before dishing out the same treatment to Panesar.

BBC: Essex boosted by in-form Bopara