可持续发展不再是可选项;对于任何负责任的矿业公司来说都是必需品。
Sustainability isn't an option anymore; it's a necessity for any responsible mining company.
I'm not comfortable with comfort. I'm only comfortable when I'm uncomfortable.
Mathematics is not a spectator sport. You have to do it to understand it.
国君自以为神圣聪明,而不去咨询官吏,自以为国家安定强大,而不注重防守,周围的邻国图谋侵略他却不知道戒备。