亲眼目睹世道的变化趋向,才知道国家治乱的关键必定在于人心的向背和风俗的好坏。
镜子经过淬炼会越来越明亮,钢铁经过锤炼会越来越坚硬。
“科学的美丽在于它让我们以一种既深刻又实用的方式理解世界。”
The development of MRI has revolutionized the field of medical imaging, allowing us to see inside the human body in ways that were previously unimaginable.