生命的历史是适应的历史。

组合问题是泛心论最困难的方面。

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.

眼睛不能同时看清楚两样东西，耳朵不能同时听清楚两种声音。

The best prophet of the future is the past.

我们从不把成功视为理所当然。