never giving up

” Santiago is endowed with this optimisticattitude towards life—courage,confidence,dignity and never giving up.

”正是这种人生态度赋予了他笔下的桑提亚哥——勇敢、自信、自尊,永不屈服的性格特征。

When we employ Weibull model to study new product penetration,"never triers",het- erogeneity in individuals and heterogeneity in consumer segmentations are three factors that should be taken into account.

在应用Weibull模型研究新产品市场渗透时,"永不采用人群"、消费者个体之间的差异、消费者群体之间的差异是研究新产品采用时需要考虑的三种因素。