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划分生死的界限至多是模糊不清的。谁能说一个在哪里结束,另一个在哪里开始?
The boundaries which divide Life from Death are at best shadowy and vague. Who shall say where the one ends, and where the other begins?
The development of attention in childhood is a foundation for self-regulation and academic achievement.
世界需要务实的解决方案,而不仅仅是理想主义的愿景。