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心理學是精神生活的科學。

The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.

The only limit to our realization of tomorrow is our doubts of today.

We need to be obsessed with our customers' unmet, unarticulated needs.

成功不是成為最好的人，而是比昨天的自己更好。

I try to avoid clichés and strive for originality in my work.