A volume fraction specification, f, is used to define fluid region, and to track the movement of free boundaries.
用一个体积分数F来定义流体区域，并用它来跟踪自由界面的运动。
One dimensional mechanical behavior of isotropic SFRC with fiber volume fraction fis equal to axial mechanical behavior of unidirec-tionally aligned short fiber composite with fiber volume fraction F.
发现体积含量为f的短纤维无序取向SFRC一维力学行为，等效于体积含量为F的短纤维单轴取向SFRC在取向轴上的力学行为。
The further bioassays results suggested that the active constituents of F. vasculosa leaves existed in petroleum ether fraction and EtOAc fraction.
生物测定结果表明，白肉榕叶的活性成分主要存在于石油醚萃取物和乙酸乙酯萃取物中。
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