boundary

n. 边界, 分界线
【计】 边界

名词复数:boundaries 

bound.a.ry

n.（名词）
【复数】 bound.a.ries
Something that indicates a border or limit.
边界线：标识边界或范围的某物
The border or limit so indicated.
边界：这样标识出来的边界或范围

<参考词汇><同义词>boundary,border,frontier,limitThese nouns all denote a line or an area separating one piece of territory from another. A
所有这些名词都指分隔一地域与另一地域的线或地区。
boundary is a limiting line:
boundary 是限制线：
例句：
A stone wall marked the boundary between the two farms. A
石墙是两个农场的分界线。

border is a line that separates political entities:
Border 是将政治实体分离的界限：
例句：
Customs officers inspected our luggage when we crossed the border.
当我们过境时海关官员检查了我们的行李。

Frontier denotes the part of a country that faces toward or fronts an adjoining country:
Frontier 意指一国中朝向或面对邻国的部分：
例句：
.that long [Canadian] frontier from the Atlantic to the Pacific Oceans, guarded only by neighborly respect and honorable obligations. (Winston S. Churchill).
.那条 自大西洋至太平洋的长边界线， 仅出于邻国的尊敬和高尚义务守护着. （温斯顿·S·丘吉尔）。

Limit denotes a boundary that surrounds an area:
Limit 意指包围一地区的界线：
例句：
Cars cannot exceed 35 miles per hour within city limits.
在市区线以内车速不能超过每小时35英里