At the start of a cross-subject（语境补充词）/cross-subject/ challenge, Leo's team received a real case rather（更确切地；而不是）/ˈrɑːðə/ than a textbook（教科书）/'tekstbuk/ exercise. The opening evidence connected poison（毒药、毒）/'pɒizn/, polar（两极的、极地的）/'pәulә/, pole（杆；极地）/poʊl/, polish（擦亮；润色）/ˈpɑlɪʃ/, politician（政客、政治家）/.pɒli'tiʃәn/, politics（政治）/ˈpɑləˌtɪks/, pond（池塘）/pɑnd/, pork（猪肉）/pɔrk/, port（港口、埠）/pɒ:t/, pose（姿势、姿态）/pәuz/, position（位置）/pəˈzɪʃn/, positive（积极的）/ˈpɒzətɪv/, possession（拥有、占有）/pә'zeʃәn/, and poster（海报、招贴）/'pәustә/. The links looked unusual, but each detail came from a witness, label, form, or measurement（尺寸、度量）/'meʒәdmәnt/ in the case file. The team has already reviewed the complete plan.

A second folder added postpone（延迟、使延期）/pәust'pәun/, pot（盆、罐）/pɒt/, pour（倒、灌）/pɒ:/, power（电力；电源）/ˈpaʊə/, pray（祈祷、恳求）/prei/, precious（宝贵的、珍贵的）/'preʃәs/, prefer（宁可、较喜欢）/pri'fә:/, preference（偏爱、优先）/'prefәrәns/, premier（总理、首相）/'pri:mjә/, pressure（压力）/ˈpreʃə/, pretend（假装、伪称）/pri'tend/, prevent（防止）/prɪˈvɛnt/, previous（以前的）/ˈpriviəs/, and primitive（原始人、早期艺术家）/'primitiv/. Some entries described people and places; others recorded objects, actions, or changing conditions. The students sorted each clue by time and source instead of forcing an early answer. The final choice was explained to everyone at the meeting.

The hardest set included principle（原则）/ˈprɪnsəpəl/, prison（监狱）/ˈprɪzən/, proceed（继续进行、进行）/prәu'si:d/, professor（教授）/prəˈfɛsər/, profit（利润）/ˈprɑfɪt/, prohibit（禁止）/prә'hibit/, proof（证据、证明）/pru:f/, protein（蛋白质）/'prәuti:in/, psychology（心理学、心理状态）/sai'kɒlәdʒi/, pub（酒馆、客栈）/pʌb/, pudding（布丁）/'pudiŋ/, purchase（购买、购买品）/'pә:tʃәs/, pure（纯的、纯净的）/pjuә/, and purse（钱包）/pərs/. Leo checked spelling and context while a partner marked facts that could be tested. Mina, who led（lead的过去式和过去分词）/led/ the discussion（讨论）/dɪˈskʌʃn/, asked for clear evidence. Then the supervisor（管理者、监督者）/.sju:pә'vaizә/ said, “Do not hide an awkward clue merely because it weakens（削弱、减弱）/'wi:kәn/ your first idea.”

The last working board brought together pursue（追赶、追踪）/pә'sju:/, qualify（取得资格、有资格）/'kwɒlifai/, quality（质量）/ˈkwɒləti/, quantity（量、数量）/'kwɒntәti/, quit（结束、退出）/kwit/, quote（引述、举证）/kwәut/, radiation（辐射）/.reidi'eiʃәn/, radium（镭）/ˈreɪdiəm/, rainbow（彩虹）/'reinbәu/, rank（等级、排）/ræŋk/, rare（稀罕的、罕有的）/rєә/, rather, rating（等级、额定功率）/'reitiŋ/, and raw（擦伤处、半成品）/rɒ:/. The group compared the four boards, removed repeated claims, and wrote（写下）/roʊt/ a short reason beside every decision（决定）/dɪˈsɪʒn/. If the first method fails, we can try another one. That rule helped them correct two mistakes without blaming a teammate（队友）/'ti:mmeit/.

The group hoped to raise awareness of（提高对……的认识）/reɪz əˈwɛrnəs əv/ choices that have an impact on（对……有影响）/hæv ən ˌɪmˈpækt ɔn/ neighbours. The hall would be home to（是……的所在地）/bi hoʊm tɪ/ an open display. Residents in favour of（支持；赞成）/ɪn ˈfeɪvər əv/ the plan spoke on behalf of（代表）/ɔn bɪˈhæf əv/ their streets and answered questions in public（公开地；在公共场合）/ɪn ˈpəblɪk/. They asked what all sides have in common（有共同之处）/hæv ɪn ˈkɑmən/; as a result（因此）/ɛz ə rɪˈzəlt/, the argument（语境补充词）/ˈɑrgjəmənt/ became（变得）/bɪˈkeɪm/ a practical discussion. The completed record told（告诉）/toʊld/ a clearer story than the first draft. It did not pretend that every clue was equally important; it showed how disciplined reading, calm cooperation（合作、协力）/kәu.ɒpә'reiʃәn/, and a checkable（语境补充词）/checkable/ decision could turn a crowded case into useful（有用的）/ˈjuːsfəl/ action.