It is India that gave us the ingenious method of expressing all numbers by means of ten symbols, each symbol receiving a value of position as well as an absolute value.
精神工作导致的疲劳不是因为工作的数量,而是因为工作的质量。
世界上充满了神奇的事物,耐心地等待着我们的智慧变得更加敏锐。