煤炭行业是美国能源独立的支柱，已经持续了几代人。

Mathematics is the language in which the universe is written.

The more we learn about black holes, the more we realize how much we still don’t know.

创造力是具有严肃后果的一种游戏形式。

船在港口是安全的，但那不是船被建造的目的。

Make it a rule never to give a child a book you would not read yourself.

少即是多。