It is difficult to determine the total number of pastoralists that exist.

确定现有的牧民总数量是很困难的.

辞典例句

For the majority of rural pastoralists, it is their most important reason to leave home town.

而对于乡村的大部分牧民来说, 这也是他们离开家乡进城的最主要原因.

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