从很小的时候起，他就展现出非凡的意志力。

From an early age, he showed an extraordinary strength of ___will.

面对屡次失败，她从未丧失继续前行的决心。

Facing repeated failures, she never lost the ___will to continue.

要始终如一地保持健康的生活方式需要很大的意志力。

It takes a lot of ___will to maintain a healthy lifestyle consistently.