《Programming Abstractions in C》学习第64天，p196-p201总结。
一、技术总结
很难，唯有继续往下看才能让其变容易。
二、英语总结
1.psychologically是什么意思？
答：
(1))psychology > psychological > psychologically。
(2)psychology: psyche("spirit/soul心灵") + -logy("study of, 研究"), the study of the spirit。"心理学"的意思来自于德国哲学家克里斯蒂安·沃尔夫的《经验心理学》(The meaning "science or study of the phenomena of the mind" is attested by 1748, in reference to Christian Wolff's "Psychologia empirica" (1732))
2.behind是什么意思？
答：behind可以做介词也可以做副词。
(1)adv. in the place where sb or sth was before。leave 和 leave behind每页太大区别，翻译时可省略。示例：p200, When you move a tower of size N-1 to the temporary spire as part of the recursive strategy, you've left a disk behind on the starting spire。
3.in light of 是什么意思？
答：in light of是美式写法，英式是in the light of，意思是：in view of; taking into account; considering(考虑)。示例：p200, To answer this questions, you need to think about the subproblem in light of the rules of the game。
三、参考资料
1. 编程
(1)Eric S.Roberts，《Programming Abstractions in C》：https://book.douban.com/subject/2003414
2. 英语
(1)Etymology Dictionary：https://www.etymonline.com
(2) Cambridage Dictionary：https://dictionary.cambridge.org
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