yán jiū rén yuán / bǐ jiào / le / Bō sī ní yà / hé / Hēi sài gē wéi nà / zài / bù tóng / lì shǐ shí qī / de / shè huì biàn huà

研究人员比较了波斯尼亚和黑塞哥维那在不同历史时期的社会变化。

Researchers compared the social changes in Bosnia and Herzegovina during different historical periods.