One should always play fairly when one has the winning cards.
The history of science is the history of men correcting their mistakes.
代數(shù)是慷慨的；她常常給予的比被要求的更多。
評論人物，應該充分肯定他的長處，寬容地諒解他的短處；辦理事務，應該首先弄清它的害處，然后再衡量它的利處。