可持续发展不是口号，而是企业必须承担的社会责任。

I'm a failed poet. Maybe every novelist wants to write poetry first, finds he can't, and then tries the short story, which is the most demanding form after poetry. And, failing at that, only then does he take up novel writing.

Every program has (at least) two purposes: the one for which it was written, and another for which it wasn't.