如何使用单词卡片(note card)
使用单词卡片是一种常见的单词记忆方法。不过，为了保证效率，首先要确定哪些单词需要记忆。理论上，单词量越多越好。实际上，如果一味贪多，结果容易打疲劳战，而且效率低。所以，高效学习者只记那些常考的核心词汇，而对于那些不太常用的学科名词、物质名词一般加以忽略。以vagary为例，可以从下列方面使用单词卡片：
1.卡片正面写单词，背面写英文注释
vagary Meaning: an unexpected and inexplicable change in something
(in a situation or a person’s behavior, etc。)难以预测的行为(或情况)，异常行为;奇想，异想天开
2.增加同义词与反义词
Meaning: an unexpected and inexplicable change in something (in a situation or a person’s behavior, etc.)
Synonyms: whim, caprice, freak
Antonyms: predictable
3.增加词根与词缀
Meaning: an unexpected and inexplicable change in something (in a situation or a person’s behavior, etc. )
Synonyms: whim, caprice, freak
Antonyms: predictable
Root: vag—to wander
Suffix: ary—marker of a noun
4.思考一词多义，每个意义增加例句
vagary
1) His wealth fluctuates with the vagaries of the stock market.
2) He has dealt with human vagaries for many years.
