英语语法分析

Collective farms (otherwise known as "kolkhoz") started to appear in the USSR since 1918.

1918年集体农庄就开始出现在苏联。

What was the reason for that - nobody knows; whether it was a war, a sprouting possibility to move to the biggest cities or a policy of kolkhoz sprawling, there is no exact answer.

至于什么原因，我们无从得知，是否因为一场战争，也可能移动到城市了，或者迁移到了巨大的集体农庄，没有人知道确切的答案。