But there is a vast difference between teaching flight, and showing points of peril that a man may march the more warily.
教人逃避，与指出险处、使人走得更谨慎，两者大不相同。
— Robert Louis Stevenson · Virginibus Puerisque, and Other Papers · Virginibus Puerisque II —
键盘照着敲一遍，更容易记住。
不用找输入框，直接敲键盘。