1. protagonist /prəˈtægənɪst/

-- the leading("first") character in a play, novel or story

Brutus is the protagonist in William Shakespeare's Julius Caesar and Antony is the antagonist.

布鲁特斯在威廉·莎士比亚的《尤利乌斯·凯撒》中是主角，而安东尼则是与他对立的角色。

 

2. protocol /'prəʊtəkɒl/

-- 1. first draft or record( of discussions, agreement, etc.) from which a treaty is drawn up; preliminary memorandum

2. rules of etiquette of the diplomatic corps, military services, etc.

The protocol initiated by the representatives of the three nations is expected to lead to a formal treaty.

人们期望由那三个国家的代表所发起的草约能成为一个正式的协定。

It is a breach of protocol for a subordinate publicly to question the judgment of his superior officer.

下级公开质问上级的判断是违反礼节的。

 

3. protoplasm /'prəʊtəplæzəm/

-- (literally,"first molded material") fundamental substance of which all living things are composed

Protoplasm distinguishes living from nonliving things.

原生质可区别生物和非生物。

 

4. prototype /ˈprəutətaip/

-- first or original model of anything; model; pattern

The crude craft in which the Wright brothers made the first successful flight in 1903 was the prototype of the modern airplane.

莱特兄弟在1903年首次试飞成功的原始飞机是现代飞机的原型。

 

5. protozoan /ˌprəutəuˈzəuən/

-- （literally,"first animal") animal consisting only of a single cell

The tiny protozoans are believed to be the first animals to have appeared on earth.

一般认为，小原生动物是首先出现在地球上的动物。