解释：使用毒性大的药物治疗疾病时，病情十成中只能去掉六成就要停药，以免伤害正气。

Between the wish and the thing the world lies waiting.

A leader has the vision and conviction that a dream can be achieved. He inspires the power and energy to get it done.

不要问国家可以为你做什么，你应该要问自己可以为国家做什么。