a demarcation dispute的用法和样例：
- My fingernails were ridged, thicker and brittle.....now there is a demarcation line on every nail, where the newer nail is smooth and supple.
- The basin flok music culture area of Huaihe River is a demarcation line of breaking through the administrative division, and has areas of one's own cultural specialty.
- She called in a mediator to settle the dispute.
- It implies that the critical line is in fact a demarcation line between the transient heat output zone and input zone (re-reddening zone) in cooling process.