促进农业增产、农民增收的制约因素较多。
There are many factors restraining the growth of agricultural production and farmers' incomes. Agricultural infrastructure remains weak.
影响大学生病理性互联网使用的因素较多。
Factors resulting in college students' PIU are diverse and complex.
发病前诱发因素较多，临床多表现为典型胸痛。
Youth patients had more predisposing factors, takes typical chest pain as clinical manifestations.
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