Sustainability isn't just good for the planet—it's good for business.
Each of us is the weaver of our own destiny, though sometimes we cannot choose the threads in our hands.
我从田径中学到的竞争艺术就是忘记的艺术,我现在提醒自己这一点。你必须忘记你的极限,你必须忘记你的疑虑、你的痛苦、你的过去。
在没有其他信息的情况下,参数的最佳估计是其样本值。