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本栏目通过分析单词的词根、词缀，或讲解单词背后的文化知识，旨在帮助同学们更好地记忆单词。
annual
词根ann = year, -ual为形容词后缀，表示“……的，有……性质的”，所以annual意思是“一年一度的，每年的”；annual还可以作名词，表示“年鉴，年报”。
【例句】
① The school trip has become an annual event.
② The children usually asked for sporting annuals.
migrate
survive
determine
【拓展】determined adj. 下定决心的；坚定的，坚决的
【例句】
① We determined to leave at once.
② Jack is determined to get this piece of work finished today.
concentrate
【例句】
① I can't concentrate on my work with all that noise.
② You should concentrate your efforts on passing exams.
effect
【例句】
① The new manager effected several changes in the company.
② Punishment doesn't have an effect on him.
【拓展】affect, perfect, defect
af- (加强) + fect (做) = affect 对某事加以推动→影响；感动；侵袭
per- (完全) + fect (做) = perfect 做得完整→完全的；完美的
de- (表示否定) + fect (做) = defect 做法不对→不足；缺陷
以上内容摘自《英语周报》，版权所有，侵权必究！
如需转载，请注明出处。
编辑：李 云 排版：李晨晖
一校：孙 星 二校：樊翠芳 三校：史俊燕
初审：尚继明 复审：李晨晖 终审：张 俊
