减肥需要巨大的意志力。

Losing weight requires tremendous ___willpower.

在这个领域的成功最终取决于意志力和毅力。

Success in this field ultimately depends on ___willpower and perseverance.

尽管有强烈的渴望，她还是凭借纯粹的意志力抵抗住了诱惑。

Despite the intense cravings, she used her sheer ___willpower to resist the temptation.