1.This dictionary is exactly what I need him to help me expand vocabulary and improve spelling.
这个词典正是我的需要他会帮助我扩充词汇量并且提高拼写能力。
2.the use of synthetic, derivative, into memory formation rules of the word, and expand vocabulary.
利用合成、派生、转化构词法规则记忆单词，扩大词汇量。
3.To revise and expand vocabulary about food and lifestyles.
复习并扩展有关食物和生活方式的词汇。
4.Many people think that reading newspaper is a good way to expand vocabulary.
人们认为阅读英文报纸是扩大词汇量的好办法
5.Expand vocabulary take advantage of compound words;
怎样利用组合词扩展词汇；