It was originally developed by groups of Chinese scholars in the Soviet Union and used by Chinese and Russian immigrants there until most of them left the country .
It was originally developed by groups of Chinese and Russian scholars in the Soviet Union , and used by Chinese immigrants there until the majority left the country .

Are these two sentences paraphrases of each other?
no

An anime adaptation by White Fox , aired in Japan between 6 April 2011 and 14 September 2011 , was licensed by Funimation in North America .
An anime adaptation by White Fox aired in Japan between April 6 , 2011 and September 14 , 2011 , and has been licensed in North America by Funimation .

Are these two sentences paraphrases of each other?
yes

The national organization was organized in March 1979 under Draft Bylaws . PAS was officially founded in March 1980 in Kansas City , Missouri .
The national organisation was organized under Draft Bylaws in March 1979 and was officially founded in March 1980 in Kansas City , Missouri .

Are these two sentences paraphrases of each other?
yes

The Crisul Mic River is a tributary of the Doba River in Romania .
The Doba River is a tributary of the River Crisul Mic in Romania .

Are these two sentences paraphrases of each other?
no