深度学习
pertinacious (per tin AY shuss) This adjective means “holding on to a belief or a plan,” “persistent.” It’s a near-twin of tenacious. (That there should be two such similar adjectives—and with varying spelling—is one of the mysterious delights of the English language.)
- No one is so pertinacious as a four-year-old who wants his parent to purchase the Whameroo, a toy advertised every three minutes on television.
- Edison’s tenacious belief that he could invent a light bulb sustained him through several false attempts.
——摘自《Fiske WordPower: The Most Effective System for Building a Vocabulary That Gets Results Fast》
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固执的（per-tin AY-shuss）这个形容词的意思是“坚持信念或计划”，“坚持不懈”。这几乎是坚韧的双胞胎。（应该有两个如此相似的形容词，并且拼写不同，这是英语的神秘乐趣之一。）
没有人像一个四岁的孩子那样固执，他想让父母购买Whamero，一种每三分钟在电视上做一次广告的玩具。
爱迪生坚信自己可以发明一个灯泡，这让他经历了几次错误的尝试。
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