2 sentences

1. 我们要研究社会经济形态的演变规律。

   wǒ​men yào yán​jiū shè​huì jīng​jì xíng​tài de yǎn​biàn guī​lǜ.

   We need to study the patterns of evolution in socio-economic forms.

   Source: Dong Chinese Dictionary

2. 大跃进运动对当时中国的社会经济产生了深远的影响。

   Dà​yuè​jìn yùn​dòng duì dāng​shí Zhōng​guó de shè​huì jīng​jì chǎn​shēng le shēn​yuǎn de yǐng​xiǎng.

   The Great Leap Forward had a profound impact on China's socio-economic situation at the time.

   Source: Dong Chinese Dictionary