“意志力”用英语怎么说？

他凭借超乎常人的保持生命尊严的信念和顽强意志力忍受着各种病痛的折磨。He suffered a long series of illnesses with tremendous dignity and fortitude.他纯粹靠意志力达到了目的.He achieved his aim by sheer strength of will.她若想成功,需要有很强的意志力.She'll need an iron will in o...