deep reason

• 深层原因

deep reason的用法和样例：

例句

1. What are the deep causes of the dispute?
   这一争端的深层原因是什么？
2. The reason of quicker household division in rural family lies in housemaster authority weakening and better economy condition of young people.
   农民分家节奏加快的深层原因是家长权威的弱化与年轻人经济能力的增强。