When the system is confined well, the change of observation water level has a linear relation with water head change.
在系统封闭很好的情况下，观测水位的变化基本与水头的变化呈线性关系。
The reactivity has a close relationship with pore structure. There is a good linear relation between the specific gasification rate and the effective specific surface area.
石油焦的比气化反应速率与孔隙结构有着紧密的关系，比气化反应速率和有效比表面积之间有着较好的线性关系。
The electromagnetic field of a linear electric quadrupole moving uniformly along the axis of the quadrupole has been calculated with the relativistic transformation relation.
利用相对论变换关系计算了沿轴线方向匀速运动的线性电四极子的电磁场。
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