1. puzzled /'p?zld/adj. 困惑的, 无法理解的→ puzzling /'p?zl??/adj. 令人迷惑的→ puzzle /'p?zl/n. 谜; 智力游戏 v. （使）迷惑→ puzzlement /'p?zlm?nt/n. 迷惑; 困惑
2. knowingly /'n????li/adv. 故意地→ know /n??/v. 知道; 认识到; 懂得→ known /n??n/adj. 已知的; 知名的
3. thorough /'θ?r?/adj. 仔细的; 缜密的→ thoroughly /'θ?r?li/adv. 彻底; 完全
4. precise /pr?'sa?s/adj. 精确的; 一丝不苟的→ precisely /pr?'sa?sli/adv. 精确地; 恰好
