1. erupt v. 喷发
A volcano erupts 火山喷发
The audience erupted with laughter. 观众爆笑。
2. essence n. 实质；精华
the essence of his theory 他的理论的本质
in essence 本质上，根本上
The essence of language is communication. 语言的本质是沟
3. eloquent a. 雄辩的
同义词：facile, fluent, silver, silver-tongued, smooth-spoken
Martin Luther King was an eloquent speaker. 马丁路德金是一位雄辩的演说家。
He is a soul-stirring, eloquent preacher. 他可是个振奋人心，能说会道的讲道人。
4. energetic a. 精力充沛的
词义辨析：energetic, vigorous, active, brisk, lively
energetic 指精力充沛、奋力从事某事业。
vigorous 指不仅表现积极、有生气，而且固有精力和活力十分旺盛。
active 指有活动能力，强调与消极或休止相反的积极活动状态。
brisk 指动作敏捷、充满活力、轻快活泼地从事某项工作或活动。
lively 侧重指轻快，机智，有生气。
For all his years, he was none the less active and energetic.
他虽年事已高，但仍生气勃勃，精力旺盛。
5. epidemic n./a. 流行病；流行性的
Sars, the bird's flu 等都是流行病
Daily, hundreds fell a sacrifice to the terrible epidemic.
每天都有几百人染上这种可怕的传染病而牺牲。