当每一分钱都要精打细算,犯错的空间就消失了。
When every penny must be calculated, the margin for error evaporates.
The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle.
教师必须相信每个孩子的可教育性。
煤炭的未来在于清洁高效利用。