3 sentences for 界 (jiè — boundary)

1. 这世界上到处都是白痴。

   zhè shì jiè shàng dào​chù dōu shì bái​chī.

   The world is full of idiots.

   Source: OpenSubtitles

2. 他们是世界上最臭名昭著的刺客。

   tā​men shì shì jiè shàng zuì chòu​míng​zhāo​zhù de cì​kè.

   They're the most notorious assassins in the world.

   Source: OpenSubtitles

3. 以这条小河为界，西边是他的土地，东边是我的。

   yǐ zhè tiáo xiǎo​hé wéi jiè, xī​biān shì tā de tǔ​dì, dōng​bian shì wǒ de.

   With this small river as the boundary, the land to the west is his and the land to the east is mine.

   Source: Dong Chinese Dictionary