If there were no trees or plants of some kinds to hold back the soil with their roots soil怎么译

题目

If there were no trees or plants of some kinds to hold back the soil with their roots soil怎么译

答案

如果没有一些品种的树或（其他）植物来固定它们根部的土壤,
这个估计是一个句子的一部分吧?我猜是讲水土流失的