The very shaping of history now outpaces the ability of men to orient themselves in accordance with cherished values. And which values? Even when they do not panic, men often sense that older ways of feeling and thinking have collapsed and that newer beginnings are ambiguous to the point of moral stasis.

The true challenge in mathematics is not solving problems, but asking the right questions.

科学的精确性既需要严谨，也需要创造力。

阅读不是眼睛的运动，而是大脑的运动。

煤炭仍将是能源结构的一部分，但它必须更清洁、更负责任。