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出自汉·桓宽《盐铁论·力耕》。穿衣吃饭是人民生活的根本所在,不可以不慎重的对待。
Topology is the study of the properties of a figure that are unchanged by any deformation.
The United States has no permanent enemies, no permanent friends, only permanent interests.
The greatest theorems often start as simple conjectures, born out of intuition.
释义:兰花生长在深谷,不会因为无人佩戴就不散发芬芳。
The problem of quality management is not what people don't know about it. The problem is what they think they do know.