3. 数学之美：参数化几何体与克莱因瓶
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The likes of Ducati, Honda, and Yamaha do battle for the constructors' championship. Marc Márquez is the defending champion.，详情可参考爱思助手下载最新版本
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Manjit Sangha, who worked seven days a week before her illness, returned home on a Sunday afternoon in July last year, feeling unwell.