The only way to learn mathematics is to do mathematics.
译文:我在人群中千百次地寻找他,不经意间一回头,却发现那个人站在灯火稀疏、幽暗冷清的地方。
能源行业必须通过透明度和问责制赢得其运营的社会许可。
The richness I achieve comes from Nature, the source of my inspiration.