先导的英文：
forerunner; precursor

We were in the van of civilization.
我们是文明的先导者。

Penicillin was the forerunner of modern antibiotics.
青霉素是现代抗生素的先导。

Science and Technology oriented
以科技为先导

They are in the vanguard of technological advance.
他们是技术发展的先导

Plastics spearheaded the advance in synthetic materials.
塑料是合成材料发展的先导。

Error is often the precursor of what is correct.
错误常常是正确的先导。

The airborne troops spearheaded the crossing of the river.
空降兵在渡河作战中担任先导。

"Error is often the precursor of what is correct, But conceit is the prelude to a fall"
错误往往是正确的先导,骄傲往往是跌跤的前奏

It also enshrines the germs of action, for good words almost always inspire to good thoughts.
这同样孕育着行为的总支，往往成为善行的先导。

It also enshrines the germs of action, for good words almost always inspire to good thoughts.”
这同样孕育着行为的总支，往往成为善行的先导。

Each pretends to be the counterpart of the forerunner.
每一个都自命是和前面一个相匹敌的。

These faculae frequently are the forerunners of sunspot formation
这些光斑常常是形成太阳黑子的先兆。

The alchemists were the forerunners of the scientists of today
炼金术士是今日科学家的先驱。

Moral corruption is the forerunner of national decline.
道德败坏是民族衰落的先兆。

forerunner of modern destroyer; designed to destroy torpedo boats.
现代驱逐舰的先驱；用于破坏鱼雷舰。

It was the precursor of or to the modem jet plane.
它是现代喷汽飞机的前身。

These include the chlorophyll precursor protochlorophyllide a
这些受体包括叶绿素的前体原叶绿酸a。

Crazing is the invariable precursor of brittle fracture.
出现小裂纹必然是脆性断裂的前兆。

That kind of surge may be a precursor to inflation.
这种飙升也许是通胀的前兆。

Error is often the precursor of what is correct.
错误常常是正确的先导。