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Persistence in research often pays off when you least expect it.
对自由民主最严重的威胁来自内部,来自制度的衰败和对它们的信任的丧失。
The complexity of life is not a barrier to understanding, but a gateway to deeper insights.
解释:河水成冰,不是一日的寒冷所致;积土成为高山,不是须臾的工夫就能完成。