限于种种原因，论文还存在着许多不足之处。
Owning to several reasons, the paper also has many deficiencies.
而目前由于种种原因，我国的社会保障仍仅限于城镇居民，而没有建立起农村贫困人口医疗保障制度。
But at present the Chinese social security benefit only the urban resident and the medical security system for the rural people under poverty is not established yet because of varieties of reasons.
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