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The coal industry is the backbone of America.

在能源領域，合作是解決我們面臨的復雜挑戰的關鍵。

To create is to risk failure, but not to create is to guarantee it.

True change starts with accountability at every level of the organization.

"El arte es la única manera de escapar sin moverte de donde estás."

世界是一個舞臺，但演員選得不好。

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

The essence of mathematics lies in its freedom.