Topology is the study of the properties of a figure that are unchanged by any deformation.
拓扑学是对图形在任何变形下保持不变的性质的研究。
The knowledge that you have emerged wiser and stronger from setbacks means that you are, ever after, secure in your ability to survive. You will never truly know yourself, or the strength of your relationships, until both have been tested by adversity. Such knowledge is a true gift, for all that it is painfully won, and it has been worth more than any qualification I ever earned.
公司的实力在于其材料和员工的诚信。