The best way to gain self-confidence is to do what you are afraid to do.
获得自信的最好方法就是去做你害怕做的事情。
The past is never truly past until it has been fully understood.
做出伟大工作的唯一方法就是热爱你所做的事。
地质学研究的真正魅力在于从已知到未知的思维锻炼。
过去已经写就，墨迹已干。