1. The pertinacity of her friend seemed more than she could bear. 她的朋友那样执拗，看来真让她受不了啦。
2. In the wide wide world there might be found another, his equal in pertinacity, but never in this little lane of ours. 在这个广袤的世界里，也许可以找到另外一个跟他一样执拗的人，但是在我们这个小巷子里根本不可能。
3. An expert problem-solver must be endowed with two incompatiblequalities – a restless imagination and a patient pertinacity. 一个解决问题的专家必须要具备两项矛盾的品质——天马行空的想象力以及不撞南墙不回头的顽固精神。
4. Sue Hine, of Relationship Services, says: "Internet pertinacity has chance a more noticeable problem over the last 18 months." “关系服务”网站的苏·海英说：“在最近的18个月中，上网成瘾已经成为一个非常突出的问题。
5. He says it's a 20-year pertinacity that began in the mid-1960s, while he devised a prototype of a excellent blue because the Museum of Natural History in New York. 他说他，的这一爱好已有20年历史，开始于60年代中期，那时他曾为纽约市的自然历史博物馆设计一条巨大的蓝鲸模型。
