The Dynamic Programming algorithm is best understood by drawing a grid whose rows correspond to the letters of the source, and whose columns correspond to the letters of the target.
为了更好地理解动态编程算法，可以画一个表格，它的行对应源单词的字母，它的列对应目标单词的字母。
2
This book, drawing on Icelanders' astonishingly detailed diaries and letters in past centuries, gives the outsider a rare glimpse into the past lives of an extraordinary people.
这本书通过借鉴冰岛人过去几个世纪惊人详细的日记和信件，使外来者对非凡冰岛人过去生活得以一瞥。
3
Use the thin-tipped pen to go over the outline of your drawing or letters. Press firmly.