女A男A：相接的箭矢（上）

??明???。???”

    ?????????两???人???坐???在???学???校???外???的???餐???馆???里???，???云???睿???翻???着???她???的???笔???记???本???：???“???自???然???数???集???和???奇???数???集???、???偶???数???集???是???一???样???大???的???。???”

    ?????????周???围???三???三???两???两???坐???着???本???校???的???学???生???，???只???要???扫???一???眼???就???知???道???，???有???不???少???学???生???在???跟???自???己???的???导???师???吃???饭???交???流???，???所???以???他???们???两???人???也???不???算???显???眼???。

    ?????????“???一???样???大???？???”???毕???远???岚???屈???起???指???头???卷???着???发???尾???，???她???的???头???发???长???得???快???，???暑???假???刚???开???始???只???是???到???下???巴???，???现???在???都???快???及???肩???了???。

    ?????????最???近???实???在???是???被???云???睿???的???作???业???折???磨???得???生???不???如???Si???，???再???加???上???社???团???活???动???什???么???的???，???她???甚???至???没???时???间???去???剪???头???发???，???要???交???流???还???得???选???在???午???餐???时???间???。

    ?????????“???偶???数???集???是???自???然???数???集???的???真???子???集???，???所???以???你???会???觉???得???b???较???小???。???但???其???实???两???个???无???限???集???可???以???建???立???一???一???对???应???的???关???系???，???那???么???就???是???一???样???大???的???。???”

    ?????????“???唔???…???…???”???有???点???懂???，???但???不???完???全???懂???。

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    ?????????云???睿???继???续???翻???笔???记???本???，???浏???览???过???一???遍???之???后???，???两???人???点???的???意???面???也???端???上???来???了???。

    ?????????他???那???一???份???还???有???带???血???丝???的???牛???排???，???让???毕???远???岚???莫???名???觉???得???