体力: physical strength, physical power...
美中不足: everything is fine except for one small defect (idiom); the fly in the ointment...
衰弱: weak, feeble...
完成: to complete, to accomplish...
精练: (textiles) to scour, to degum (silk), variant of...
持: to hold, to grasp, to support, to maintain, to persevere, to manage, to run (i.e. administer), to control...
