1.echolocation n.回声嚏t0多去(physiological process for locating distant or invisible objects by sound waves reflected back to the emitter from the objects)

分拆记忆：echo(回声)+location(位置)--回声定位法

例：Dolphins use echolocation to locate distant prey.

2.eclipse n.（日、月）食(the partial or complete obscuring relative to a designated observer, of one celestial body by another);（声誉、地位等的）消失，衰落(falling into obscurity)

联想记忆：ec+lip(嘴唇)+se--日月变得像弯弯的唇--日食，月食

例：solar eclipse日食//The role of the U.S.Navy was threatened with permanent eclipse.

3.ecology n.生态学，环境适应学(a branch of science concerned with the inter-relationship of organisms and their environments)

词根记忆：eco(环境，生态)+logy(学科)--生态学

4.economy n.经济(the system of production, distribution and consumption);节约(thrifty and efficient use of material resources);a，经济的(designed to save money)

发音记忆：“依靠农民”一中国是农业大国，经济发展离不开农民--经济的

例：Manufacturing constitutes a relatively small proportion of the economy.

派生词：economic(a．经济的)

5.ecosystem n.生态系统(the complex of a community of organisms and its environment functioning as an ecological unit)

词根记忆：eco(环境，生态)+system(体系)--生态系统

例：Coral reefs are one of the most fragile marine ecosystems on earth.

6.edge n.优势(advantage)；边（缘）(border)

例：These changes will enhance our bank's image and give us the edge over our competitors.//the edge of the galaxy

7.edible n．食品(things be able to eat)；a．可食用的(fit to be eaten)

词根记忆：ed(吃)+ible（可…的）--可食用的

例：Higher-than-normal levels of manganese, strontium, and vanadium probably indicate a less nutritious diet heavily dependent on edible plants.

派生词：edibility(n.可食性)

同根词：inedible(a．不能吃的)

8.editorial n.社论(a newspaper or magazine article that gives the opinions of the editors or publishers);a．编辑的；社论的(of or relating to an editor or editing)

词根记忆：来自editor(n.编辑;社论撰稿人)

例：The first provides evidence in support of a recommendation that the editorial supports.

派生词：editorially(ad.以编辑身份地；以社论形式)

同根词：editorship(n.编辑；校订)

9.educator n.教育家(one skilled in teaching)

词根记忆：来自educate(v.教育，培养)

例：She was an educator and a builder of institutions and organizations.

同根词：education(n.教育)

10.effect v.生效(to put into operation)；引起(to cause to come into being);n.效应(influence)；结果(accomplishment)

词根记忆：ef（出）+fect(做)一做出效果一生效

例：People's enthusiasm for the product effected an increase in sales.//Too much stress can have an adverse effect on one's health,