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1.membrane n.薄膜，细胞膜(cell membrane) 例：In pterosaurs(翼龙),a greatly elongated fourth finger of each forelimb supported a winglike membrane. 2.memoir n.回忆录(a written remembrance) 词根记忆：memo(记忆)+ir--回忆录 例：The former president wrote his memoirs shortly before he died. 3.memorandum n.备忘录(a written reminder)；便笺(an informal written note of a transaction or proposed instrument) 词根记忆：来自memo(n．备忘录) 例：The following appeared as part of a company memorandum. 同根词：memorial(n.纪念碑)；commemorate(v.纪念) 4.merchandise v.买卖，销售(to sell sth. using advertising, etc.);经商；n.商品(commodities) 词根记忆：来自merchant(n.商人) 例：Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five. 派生词：merchandiser(n.商人) 同根词：mercantile(n.商品：a.商业的) 5.merchant n.商人(businessman) 词根记忆：merc(贸易，商业)+h+ant--商人 例：A merchant discounted the sale price of a coat and the sale price of a sweater. 同根词：merchandise(n.商品，货物) 6.merge v.合并(to become combined into one)；使合并(to cause to combine, unite，or coalesce)；吞没(to plunge or engulf in sth.) | 
