1.oternal a．永久的，永恒的(existing forever)

例：Some astronomers hold that the universe was etemal and infinitely steady-state.

2.ethanol n.乙醇，酒精(a colorless volatile flammable liquid that is the intoxicating agent in liquors and is also used as a solvent and in fuel)

例：Many countries that are large consumers of sugarcane increased their production of sugarcane-based ethanol.

3.ethic n.道德标准，行为准则(a theory or system of moral values)

例：Some academicians believe that business ethics should be integrated into every business course.

派生词:ethical(a．与伦理有关的)

4.ethnic a．种族的，民族的(of a national, racial or tribal group that has a common cultural tradition)

词根记忆：ethn(种族)+ic--种族的，民族的

例：Such self-help networks encourage and support ethnic minorit3t entrepreneurs.

派生词:ethnical(a.种族的)；ethnicity(n.种族划分)

同根词：ethnocentric(a．种族中心主义的)；ethnological(a．人种学的)

5.ethnographic a．人种学的，人种论的(the study and systematic recording of human cultures)

词根记忆：来自ethnography(n.人种学，人种论)

例：ethnographic information人种学信息

同根词：ethnologist（n.人种学者：人类文化学者）；ethnocentrism(n.民族优越感)

6.ethnomusicology n.人种音乐学(the study of music in a sociocultural context)

词根记忆：ethno( =ethnic人种的)+music（音乐）+ology(学科)一人种音乐学

例：In 1905, B61a Bart6k and ZoltC:in Kodtily began their pioneering work in ethnomusicologl, and they were armed only with an Edison phonograph and insatiable curiosity.

派生词:ethnomusicological(a．人种音乐学的)

7.euphoria n.精神欢快：兴奋(a feeling of well-being or elation）

词根记忆：eu(好)+phor(带来)+ia -带来好的情绪一兴奋

例：I cannot describe the euphorial felt when my daughter was born.//For a small percentage of depressed patients, missing a night's sleep induces a temporary sense of euphoria.

8.eusocial a．（昆虫）完全群居的（living inicooperative group）

词根记忆：eu(好)+social(社会的)一喜欢融入社会的--完全群居的

例：eusocial insects群居类昆虫

9.evacuation n.散离，疏散(the act or process of evacuating）

词根记忆：来自evacuate(v.撤离，疏散)，e+vacu(空)+ate--撤空了--撤离

例：The evacuation was done in a calm and orderly manner.

同根词：vacant(a．空的)；vacuum(n．真空)

10.evade v.躲开(to slip away)；逃避(to escape or avoid by cleverness or deceit)

词根记忆：e+vade(走)--走出去--躲开

例：evade an attack躲避攻击//evade taxes逃税

派生词:evader(n．逃避者)：evasion(n.躲避；逃避)