采矿效率不仅仅是成本问题，更是减少环境影响的问题。

我努力在场上场下的每一刻都保持专注。

译文：人生不能过于安逸闲散，有了可以不断追求的事业，才能收回安逸之心。日用花费必须要节俭，只有杜绝奢靡，才能彰显勤俭的美德。赏析：生于忧患死于安乐。逸豫可以亡身，忧劳可以兴国。一个人过于安逸，就会无所事事，丧失斗志。一粥一饭当思来之不易，半丝半缕恒念物力维艰。

The true potential of computer science is realized when it is applied to solve real-world problems.

The only freedom which deserves the name is that of pursuing our own good in our own way， so long as we do not attempt to deprive others of theirs， or impede their efforts to obtain it.

教育本身就是生活，而不是为生活做准备。

真正的进步既要衡量经济增长，也要衡量生态系统的健康。