The mother-child relationship is paradoxical and, in a sense, tragic. It requires the most intense love on the mother's side, yet this very love must help the child grow away from the mother, and to become fully independent.

Quantum mechanics is not just a theory about the world, it is a description of the world at its most fundamental level.

好的研究关键不仅在于方法，还在于问题的清晰性和数据的质量。