extent
/ɪkˈstent/noun
in sing.
1- the area covered by something地域：
an enclosure ten acres in extent.
一个占地10英亩的围场。
1.1
- the degree to which something has spread; the size or scale of something范围; 程度; 规模; 大小：
the extent of global warming.
全球变暖的程度。
1.2
- the amount to which something is or is believed to be the case…的程度：
everyone will have to compromise to some extent
每个人都必须作出某种程度的让步
they altered the document to such an extent that it contained little in the way of new policy.
他们将文件改得使里面属于新政策的东西所剩无几。
词源
Middle English （in the sense 'valuation of property, especially for taxation purposes'）： from Anglo-Norman French extente, from medieval Latin extenta, feminine past participle of Latin extendere'stretch out' （see EXTEND）.