extensive
adj. 广阔的；广泛的；巨大的，大量的；（农业）粗放（经营）的
例句
Extensive repair work is being carried out.
大规模的修缮工作正在进行。
《牛津词典》
The report is underpinned by extensive research.
这份报告以广泛的研究为基础。
He has garnered extensive support for his proposals.
他为他的提议赢得了广泛的支持。
《柯林斯英汉双解大词典》
