客戶的忠誠(chéng)是贏得的，而不是給予的。
材料中拓?fù)浜蛯?duì)稱性之間的相互作用可以導(dǎo)致意想不到且令人興奮的物理現(xiàn)象。
The best moments in our lives are not the passive, receptive, relaxing times… The best moments usually occur if a person’s body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.