前綴proto-詞源，詞義和例子

漢：來源於希臘語,意爲“first”。在元音字母前，字母o脫落。意爲“first”的詞根有pri(priority),prin(principled),prim(prima donna)等。

英：word-forming element meaning "first," from Gk. proto-, comb. form of protos "first," superlative of pro "before" (see pro-).

1.protagonist
n.chief person in a drama;chief person in a story or factual event.戯劇的主角；小說的主人公 agon=struggle
Every movie is the same;there's a good guy and a protagonist he has to defeat.
每部電影都不例外；都會有一個好人以及他要戰勝主人公。

2.protocol
n.first or original draft of an agreement,signed by these making it;code of behavior,etiquette as practiced on diplomatic occasions 草案，協議，行動槼約，外交禮節 col=glue

3.prototype
n.first or original example form which others have been or will be copied or developed 原型，模範，樣本 proto=first
General Motors unveiled a prototype of its E-car,an electric car.
通用汽車公司公佈了電動車E-car 的模型。