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词根crease来自拉丁语，意为grow，make，表示“增长；产生”。其变形为cre。
释 [dɪˈkriːs] n./v. 减少
解 de-表示“除去”，crease表示“增长”，除掉增长，即“减少”。
例 Population growth is decreasing each year. 人口增长逐年下降。
释 [ɪnˈkriːs] n./v. 增加，提高
解 in-表示“里面”，crease表示“增长”，向里增长，即“增加”。
例 Crime is on the increase. 犯罪活动日益猖獗。
释 [kriˈeɪt] v. 创造，创作；造成
解 cre表示“产生”，-ate表示“做，造成”，造成产生，即“创造，创作”。
例 The businesses created many jobs in that region. 这些企业在那个地区创造了许多就业机会。
creative [kriˈeɪtɪv] a. 创造性的
creature [ˈkriːtʃər] n. 生物；人；创造物
recreation [ˌrekriˈeɪʃn] n. 娱乐，消遣；休养
procreate [ˈproʊkrieɪt] v. 生育，生殖
concrete [ˈkɑːŋkriːt] a. 具体的v. 使凝固n. 混凝土
1. de-（除去） devalue v. 贬值，降低…的价值
2. in-（里面） indulge v. 沉溺；满足；放任
3. -ate （做，造成） frustrate v. 挫败，阻挠
测验大比拼
I. 搜索关键词：请将下列单词的正确形式填入句子中，使句子完整。
antecedent dubious concede chronicle unanimous
1. Bess fi nally ______ that Nancy was right.
2. We shall first look briefl y at the historical ______ of this theory
3. He showed this vast ______ of Napoleonic times.
4. This claim seems to us to be rather ______.
5. The board ______ approved the project last week.
答案： 1. conceded 2. antecedents 3. chronicle 4. dubious 5. unanimously
II. 复习对对碰：请将下列词汇和英文词义配对。
debase recline accord recreation concord
A. to sit or lie in a relaxed way, with your body leaning backward
B. the fact of people doing things for enjoyment, when the are not working
C. a formal agreement between two organizations, countries, etc.
D. to make somebody/something less valuable or respected
E. peace and agreement
答案： debase—D; recline—A; accord—C; recreation—B; concord—E
III. 备忘笔记本：请写出以下词根、词缀的含义和相关词，写不出来的部分要重点学习、记忆哦！
1. crease _________________________
2. cid _________________________
3. corp _________________________
4. dis- _________________________
5. cess _________________________