5 sentences

1. 这只是一条界线。

   zhè zhǐ shì yī tiáo jiè​xiàn.

   It's just a line.

   Source: OpenSubtitles

2. 这个公园是两个区之间的界线。

   zhè gè gōng​yuán shì liǎng gè qū zhī​jiān de jiè​xiàn.

   This park serves as the boundary between the two districts.

   Source: Dong Chinese Dictionary

3. 沿着那条路一直走，就会抵达南方界线。

   yán​zhe nà tiáo lù yī​zhí zǒu, jiù huì dǐ​dá nán​fāng jiè​xiàn.

   If you walk down that path, you will reach the Southern Limit Line.

   Source: OpenSubtitles

4. 你很擅长划清界线啊。

   nǐ hěn shàn​cháng huà​qīng jiè​xiàn a.

   You're good at drawing boundaries.

   Source: OpenSubtitles

5. 你的行为已经超出了道德界线。

   nǐ de xíng​wéi yǐ​jīng chāo​chū le dào​dé jiè​xiàn.

   Your behavior has already crossed the moral line.

   Source: Dong Chinese Dictionary