Based on classic elastic stability theory of framework, the four-moment equation and the stability equations of member group considering joint rigidity are derived and extended to study trusses.

在经典的刚架弹性稳定理论基础上推导了考虑节点刚度的四弯矩方程和构件群稳定方程，并将其应用于桁架结构。

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Students are divided into four groups, and each group member has different "job".

学生们分为四组，每组成员各司其职，共同完成学习任务。

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It was from the four-member British group the Beatles.

由英国四人乐团甲壳虫演唱。

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At least four other core members, including one leading member of the group who uses the handle Sabu, have yet to be detained.

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One out of every four people in town is a dues-paying member of a group called Friends of the Fossil Library.

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In April, group member Mohammed Al-Bajadi was sentenced to four years behind bars.

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