1. 边界，疆界，限界
2. 界限，范围，限度
3. 分界线，边线，界标，界线
4. 分野，间界
5. 边缘
6. 【板球】界线；使球越过边界线的击球（得加分）

1. [C]分界线 the dividing line
2. [C]界限,范围 the outer limit of anything

1. the line or plane indicating the limit or extent of something

2. a line determining the limits of an area

3. the greatest possible degree of something;

   "what he did was beyond the bounds of acceptable behavior"
   "to the limit of his ability"
   

1.（土地的）分界线，边界
Theboundary of an area of land is an imaginary line that separates it from other areas.

boundary什么意思

e.g. ...the Bow Brook which forms the westernboundary of the wood...
构成了这片树林西部边界的鲍溪
e.g. Drug traffickers operate across national boundaries.
贩毒分子进行跨国贩毒活动。

2.（学科或活动的）界限，边界
Theboundaries of something such as a subject or activity are the limits that people think that it has.

e.g. The boundaries between history and storytelling are always being blurred and muddled.
历史和轶闻的分界向来是模糊而混乱的。
e.g. ...extending the boundaries of press freedom.
扩大新闻自由的界限

1. 边缘：现在我们来研究T0,T1,T2,T3的边缘(boundary)的性质:T1的边缘是由二端点组成, 的边缘是由三个顶点及三个线段组成, T3是由四个顶点和六个线段及四个三角面组成.

2.boundary：bdy; 边界