很显然，传统的单端正激变换器很难适应这一发展趋势，因此，必须找到一种新型的拓扑结构。
It is clear that the traditional single-ended forward converter is difficult to adapt to the trend, so, it is necessary to find a novel topology.
结论单侧臀肌挛缩症伴骨盆倾斜，多由臀中肌、臀小肌挛缩带引起髋关节外展畸形导致负重力线的改变而致病。
Conclusion gluteus medius and gluteus minimus could result in coxae abduction malformation and alteration of weight line, leading to pelvic obliquity.
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