Group17 Prot, Proto-first
“第一”
protagonist
n. 主角　
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“凯撤大帝”中是主角，而安东尼则是他的对手。
protocol
n. 1. 草约 2. （外交等的）礼节　
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.
下级公开质疑上级的判决是违反礼节的。
protoplasm
n. 原生质　
Protoplasm distinguishes living from nonliving things.
原生质可区别出生物和非生物。
prototype
n. 原型　
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年首先试飞成功的原始飞机，是现代飞机的原型。
protozoan
n. 原生动物　
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。