strengthem实用性strengthn.力气；强度；力量；长处strength mis-matching强度组配strength-index method力学强度指标法strength of lower limbs下肢肌力strength at early stage早期强度strength retention rate强度保留率strength characteristic强度特征strength-weight ratio强度重量比,强重比strength and well being富强康乐之境strength duration curve强度时间曲线strength of the country国力