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——《中國人之直言》（1920年4月3日）

A good memory is needed after one has lied.

Patience and precision are the unsung heroes of scientific progress.

粒子的糾纏不僅僅是一個理論上的奇觀；它是宇宙的一個深刻特征，我們才剛剛開始理解。

Maybe every man has had two such women, at least two. Married to a red rose, over time, the red becomes a mosquito blood stain on the wall, while the white remains "moonlight before the bed"; married to a white rose, the white becomes a grain of sticky rice on the clothes, while the red remains a cinnabar mole on the heart.

The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome of the process of modernization.