x²+z²=y²
https://images.plurk.com/7IcV9ylZDDn21BSkeANlWE.jpg https://images.plurk.com/CSgSDpEMo54fexXwpfQno.jpg https://images.plurk.com/ohjYdV4xBkZnaTjkP9R1E.jpg https://images.plurk.com/4yFPy9DIJxfD3sh3xivGhf.jpg 瘋了
載入新的回覆