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实现明天理想的唯一障碍是今天的疑虑。
The only limit to our realization of tomorrow is our doubts of today.
永远不要停止学习;世界总是在变化。
I like to tell a story and not explain it. I like to leave it open-ended.
The molecules that mediate pain are ancient, revealing how deeply rooted this sensation is in evolution.