成功不是偶然的,它是努力、坚持、学习和牺牲的结果。
The computer is just a tool. The pencil is also a tool. It's about how you use it.
The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.