extensive

形容词 extensive:

1. large in spatial extent or range or scope or quantity
   同义词：extended
2. broad in scope or content
   同义词：across-the-board, all-embracing, all-encompassing, all-inclusive, blanket, broad, encompassing, panoptic, wide
3. of agriculture; increasing productivity by using large areas with minimal outlay and labor

1. The castle will undergo extensive and costly renovations.
   那城堡要用钜资进行全面整修。
2. The teacher had both extensive knowledge and profound scholarship.
   先生的学问博大精深。
3. There is now extensive literature dealing with the First World War.
   现有大量关于第一次世界大战的文献。
4. He has an extensive vocabulary.
   他词汇很丰富。
5. Moscow television carried extensive coverage of the pullout. A Soviet television correspondence said the convoy had come under fire but did not provide details.
   莫斯科电视为撤军做了广泛的报导，一则苏联电视报导说车队曾受攻击，但是并未提供细节。　
6. I have benefited a lot from extensive reading.
   广泛的阅读使我受益匪浅。
7. The device had undergone extensive testing.
   这种装置经受过广泛的试验。
8. He selected an extensive reading course this term.
   这个学期他选修了泛读课程。

ex.ten.sive

adj.（形容词）
Large in extent, range, or amount.
广大的，广阔的：广度的，大范围的，大量的
Of or relating to the cultivation of vast areas of land with a minimum of labor or expense.
粗放的，大面积耕种的：以最少的劳动或费用大面积耕种的或与此有关的

【引伸】
exten.sively
adv.（副词）
exten.siveness
n.（名词）