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.
A mathematician's intuition is as important as rigorous proof.
君子不以水为镜,而以人为镜。以水为镜,只能看到面容;以人为镜,可以知道吉凶。
你每花一块钱购买一些实质性的东西,预计在其寿命结束时要支付一块钱的维修、保养或处理费用。