boundary

• 名词，指标示某个区域、领土或概念边缘的界线、界限或分界。也可指限制或范围。

A noun referring to a line, limit, or border that marks the edge of an area, territory, or concept.

1. Physical dividing lineB1formal

   A line that marks the limits of an area; a border.

   边界

   • The river forms the natural boundary between the two countries.
   • They built a fence to mark the boundary of their property.
   • The boundary of the national park is clearly signposted.

   同义词borderdemarcation linedividing lineedgefrontierlimitmarginperimeter

2. Limit of a subject or sphereB2formal

   The dividing line between different subjects, areas of activity, or fields of knowledge.

   界限

   • The boundary between science and philosophy is often blurred.
   • This case pushes the boundary of what is legally acceptable.
   • The artist constantly explores the boundaries of traditional painting.

   同义词borderlinebounddemarcation linedividing lineedgefrontierlimitparameterthresholdverge

3. Personal limitB2informal

   A limit that a person sets to protect their own space, feelings, or well-being.

   个人边界

   • It's important to set clear boundaries in a relationship.
   • He crossed a boundary by asking such a personal question.
   • She needs to learn to establish boundaries with her colleagues.