boundary

中文意思

• n. 边界，分界线，范围

英文释义

• n. the line or plane indicating the limit or extent of something
• n. a line determining the limits of an area

词形变化

复数

boundaries

例句

1. n. 边界，分界线，范围

   The river forms a natural boundary between the two countries.

   这条河流构成了两国之间的天然分界线。