4 sentences

1. 这两条河流在山脚下交汇，随后水流变得更加湍急。

   zhè liǎng tiáo hé​liú zài shān​jiǎo xià jiāo​huì, suí​hòu shuǐ​liú biàn de gèng​jiā tuān​jí.

   The two rivers meet at the foot of the mountain, after which the current becomes more rapid.

   Source: Dong Chinese Dictionary

2. 这座城市自古以来就是东西方文化交汇的重要中心。

   zhè zuò chéng​shì zì​gǔ​yǐ​lái jiù shì dōng​xī​fāng wén​huà jiāo​huì de zhòng​yào zhōng​xīn.

   Since ancient times, this city has been an important center for the convergence of Eastern and Western cultures.

   Source: Dong Chinese Dictionary

3. 双方在这次会谈中实现了利益交汇，达成了初步协议。

   shuāng​fāng zài zhè cì huì​tán zhōng shí​xiàn le lì​yì jiāo​huì, dá​chéng le chū​bù xié​yì.

   Both sides found a convergence of interests during the talks and reached a preliminary agreement.

   Source: Dong Chinese Dictionary

4. 冷空气与暖气流在这一带交汇，产生了大范围的降雨。

   lěng kōng​qì yǔ nuǎn qì​liú zài zhè yī​dài jiāo​huì, chǎn​shēng le dà fàn​wéi de jiàng​yǔ.

   The meeting of cold and warm air masses in this area resulted in widespread rainfall.

   Source: Dong Chinese Dictionary