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

分拆記憶：echo(回聲)+location(位置)--回聲定位法

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);（聲譽、地位等的）消失，衰落(falling into obscurity)

聯想記憶：ec+lip(嘴唇)+se--日月變得像彎彎的唇--日食，月食

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

3.ecology n.生態學，環境適應學(a branch of science concerned with the inter-relationship of organisms and their environments)

詞根記憶：eco(環境，生態)+logy(學科)--生態學

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

發音記憶：“依靠農民”一中國是農業大國，經濟發展離不開農民--經濟的

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

派生詞：economic(a．經濟的)

5.ecosystem n.生態系統(the complex of a community of organisms and its environment functioning as an ecological unit)

詞根記憶：eco(環境，生態)+system(體系)--生態系統

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

6.edge n.優勢(advantage)；邊（緣）(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)

詞根記憶：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.

派生詞：edibility(n.可食性)

同根詞：inedible(a．不能吃的)

8.editorial n.社論(a newspaper or magazine article that gives the opinions of the editors or publishers);a．編輯的；社論的(of or relating to an editor or editing)

詞根記憶：來自editor(n.編輯;社論撰稿人)

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

派生詞：editorially(ad.以編輯身份地；以社論形式)

同根詞：editorship(n.編輯；校訂)

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

詞根記憶：來自educate(v.教育，培養)

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

同根詞：education(n.教育)

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

詞根記憶：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,