求翻译：但是，由于中小企业自身原因和外部环境的原因，中小企业融资问题日益成为制约其发展的巨大的“瓶颈”。是什么意思？

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However, for small and medium-sized enterprises and the external environment of the reasons for their own reasons, small- and medium-sized enterprises are increasingly becoming a problem of financing constraints on their development of the magnitude of the "bottleneck".

But, as a result of small and medium-sized enterprise own reason and the external environment reason, the small and medium-sized enterprise financing question becomes day by day restricts its development greatly “the bottleneck”.

However, due to the reason of itself and the external environment for SMEs, SME financing problem increasingly restricting the development of its huge "bottlenecks".