请问there has long been是什么意思，有什么用法，麻烦举几个例子说明一下，谢谢

长期以来there has long been。

重点词汇

long长的;长期的;长;长时间的;长久的;长期地;长久地;很久地;用于名词后强调某事发生在某整段时间;渴望。

been曾经;曾经到过; are的过去分词; be的过去分词。

There has long been resistance among business leaders to the expansion of education.

长期以来，商界领袖对教育扩张一直持抵制态度。

There has long been different opinions about Green barriers.

长期以来，人们对绿色壁垒存在着不同的看法。

In ancient China, there has long been the theme of painting monkeys.

在古代中国早已出现猴题材的绘画。

In the history of western literature there has long been a tradition of folly literature.

在西方文学传统中有一个源远流长的愚人文学传统。