磨练 hone

经过磨练的 well-tried

艰苦的磨练 school of hard knocks

经受磨练 go through the mill ; go through the hoops ; put through the mill

磨练他们的交际技能 honing their communicative skills

苦难是磨练人的好机会 Adversity is a good discipline

日常磨练 routine training

不断的磨练 Sharpen the saw

磨练意志 hone will

磨练战斗 Hone combat ; Hone battle