71、发明的秘诀在不断的努力。——牛顿
The secret of invention in ceaseless effort.
72、目标越接近，困难越增加。——歌德
Target the closer it gets, the more difficult to increase.
73、失败是坚忍的最后考验。——俾斯麦
The final test failure is perseverance.
74、停止奋斗，也就停止了。——卡莱尔
Stop fighting, there would be stopped.
