活动构件被限制在哪几个平面内移动。例如，只能在xy平面内移动，其公共约束m=4；只能在xyz三个方向移动，其公共约束m=3
XML schema语言可以描述XML消息组件上的绝大部分公共约束。
The XML Schema language can describe most common constraints on components of XML messages.
法律调整的总体思路是应当建立有效的公共选择和公共约束机制。
The main method of legal adjustment is to establish the efficacious mechanism relevant to public selection and public restriction.
对阿苏尔组的两个性质进行了分析，证明了其静不定次数等于其公共约束数目。
The kinematic and static determinations of Assur's links group have been analysed. It has been also demonstrated that the member of statical indeterminate is equal to its common constraint.
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