Mathematics is the art of giving the same name to different things.
数学是为不同事物赋予相同名称的艺术。
实际发展水平与潜在发展水平之间的距离,前者由独立解决问题决定,后者由在成人指导下或与更有能力的同伴合作解决问题决定。
The woodcutter's axe begged for its handle from tree,the tree gave it.
I choose a block of marble and chop off whatever I don't need.
资本配置的效率是经济增长的关键。