我不让任何人定义我。
When you have a good crop, the farmer is happy, his wife is happy, the children are happy, the animals are happy, and the land is happy.
弦理论提供了一个框架,使得量子力学和广义相对论能够和谐共存。
大部分公司都不能永久地成功下去。他们犯了什么根本性错误么?他们通常没有把握好未来。