先锋的英文：
herald
pioneer

参考例句：

In essence, resistance of avant garde art is just a game.
先锋艺术的反抗实质上只是一种游戏。

Andy Canvin is a pioneer on the strange frontier of DNA genealogy
安迪·卡文是DNA谱系学奇异前沿的先锋人物。

Among those arrested now is avant-garde artist John.
现在那些被抓的人士中有先锋艺术家约翰。

The bid was spearheaded by James Boyle, the chairman of Scotland's cultural commission.
苏格兰文化委员会主席詹姆士·波义耳是这次活动的先锋。

Andy Canvin is a pioneer on the strange frontier of DNA genealogy.
安迪卡文是DNA谱系学奇异前沿的先锋人物。

act as the spearhead of
当...的先锋

The van is under attack.
先锋部队遭到攻击。

You will spearhead the sales campaign.
你当促销活动的先锋。

I am a pioneer.
我是个先锋。

In Paris he made friends among the avant-garde.
他在巴黎结交先锋人士。

herald是什么意思：
v. 预示，预告；传达，通报
n. 传令官，通报者；使者，先驱

The song of birds heralds spring.
鸟鸣报春到。

Dawn is the herald of day.
曙光是白昼的先驱。

The crocus is a herald of spring.
报春花是春天的预兆。

In England, the cuckoo is a herald of spring.
在英格兰，布谷鸟是春天的信使。

The fall of a leaf heralds the advent of autumn
一片落叶预兆秋天的来临。

pioneer是什么意思：
n. 拓荒者；开拓者；先驱
v. 首创；当先驱，成为开拓者

They were the pioneers of the American West.
他们是美国西部的开拓者。

The company pioneered the use of the silicon chip.
这家公司首先使用硅片。

Are the Young Pioneers having music class?
那些少先队员在上音乐课吗？

The young pioneers all bear red scarves.
少先队员们都佩戴着红领巾。

This company pioneered on-job training.
这一公司首创在职培训。