无限的概念不仅仅是一个数学抽象，而是一个物理现实。
The concept of infinity is not just a mathematical abstraction, but a physical reality.
The dairy sector must embrace technology to stay relevant.
Cultivate 12 people who love you， because they are worth more than 12 million people who like you.
过去总是紧张的，未来是完美的。
如果您不愿意对它们负责，那就不要有好主意。