Worth repeating: measure twice, cut once.
这值得说两遍:量两次才切一次。
创新是企业发展的动力,没有创新就没有未来。
释义:天之险在于高不可升,地之险在于山川丘陵。王公设险以保卫国家,险的功用非常大。
The study of mathematics is a constant dialogue between the concrete and the abstract.