创新不是一种选择；它是煤炭行业生存的必要条件。

没有自由就没有创造。

The pursuit of knowledge for its own sake, an almost fanatical love of justice, and the desire for personal independence—these are the features of the Jewish tradition which make me thank my stars that I belong to it.

过去是一位老师，如果我们愿意学习的话。