《算法导论(第4版)》学习第 3 天，p4-p5 总结，总计 2 页。
一、技术总结
1.instance
Thus, given the input sequence h31; 41; 59; 26; 41; 58i, a correct sorting algorithm returns as output the sequence h26; 31; 41; 41; 58; 59i. Such an input sequence is called an instance of the sorting problem.
二、英语总结(生词：1)
1.fertile
(1)fetile: ferre(“to bear”)
adj. (of land) can produce a large number of good quality crops(肥沃的)。
(2)fertile ground for something
idom. a place that produces a lot of good results(…的沃土)。
(3)示例
This problem arises frequently in practice and provides fertile ground for introducing many standard design techniques and analysis tools(《《算法导论(第4版)》》p3)。
关于英语的注解同步更新汇总到 https://github.com/codists/English-In-CS-Books 仓库。
三、其它
今天没有什么想说的。
四、参考资料
1. 编程
(1) Thomas H. Cormen，Charles E. Leiserson，Ronald L. Rivest，Clifford Stein，https://book.douban.com/subject/35591269/
2. 英语
(1) Etymology Dictionary：https://www.etymonline.com
(2) Cambridge Dictionary：https://dictionary.cambridge.org
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