—— 请按键盘 空白键 开始游戏 ——

要学会控制投资风险,使用适当的风险管理工具。
Mathematics is not a spectator sport—you have to engage with it to appreciate its beauty.
"The power of a good story is that it can transport you to another place, another time, and make you feel like you're part of something bigger."
人は、自分が救われるために、他人を救う。