Systems are composed of hundreds of models that contain thousands of elements.
系统由数以百计的模型组成，而模型又由数以千计的元素组成。
With 30 years of research behind us, hundreds of models of shoes are available today and many address the needs for different foot types.
经过了30年的研究，如今市面上已有几百种不同款式的运动鞋，许多鞋款都考虑到不同脚型的需要。
With 30 years of research behind us, hundreds of models of shoes are available today and many address the needs for different foot types.
经过了30年的研究，如今市面上已有几百种不同款式的运动鞋，许多鞋款都考虑到不同脚型的需要。
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