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16:59#有料 #高清 #素人 #18禁｜張旭微積分2020版(下)｜向量微積分｜重點六：向量場與保守場｜觀念講解｜數學老師張旭
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24:48#火辣 #有料 #高清 #大學｜張旭微積分2020版(下)｜向量微積分｜重點五：旋轉體分析｜精選範例5-2｜數學老師張旭
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10:05#黑人 #無碼 #高清 #持久｜張旭微積分2020版(下)｜向量微積分｜重點五：旋轉體分析｜精選範例5-1｜數學老師張旭
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4:54#持久 #硬核 #有料 #外流｜張旭微積分2020版(下)｜向量微積分｜重點十：梯度、旋度、散度｜精選範例10-1｜數學老師張旭
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16:21#高清 #無碼 #持久 #有料｜張旭微積分2020版(下)｜向量微積分｜重點四：曲線分析｜精選範例4-4｜數學老師張旭
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8:36#素人 ##無碼 #流出｜張旭微積分2020版(下)｜向量微積分｜重點四：曲線分析｜精選範例4-3｜數學老師張旭
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14:58#持久 #黑髮 #高清 #外流｜張旭微積分2020版(下)｜多變數函數的微積分｜重點十六：二重積分的極座標轉換｜精選範例 16-4｜數學老師張旭
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16:42#瘋狂 #實境秀 #高清 #火辣｜張旭微積分2020版(下)｜多變數函數的微積分｜重點八：偏微分運算律｜精選範例 8-3｜數學老師張旭
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49:31#無碼 #高畫質 #教室 #刺激｜張旭微積分2020版(下)｜多變數函數的微積分｜重點八：偏微分運算律｜觀念講解(上)｜數學老師張旭
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6:33#無碼 #高清 #十八禁 #教室｜張旭微積分2020版(下)｜多變數函數的微積分｜重點六：二變數函數的偏微分｜精選範例 6-2｜數學老師張旭
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3:14#無碼 #大學 #素人 #實境｜張旭微積分2020版(下)｜多變數函數的微積分｜重點三：二變數函數極限特殊求法｜精選範例 3-6｜數學老師張旭
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4:20#口教 #瘋狂 #火辣 #激情｜張旭微積分2020版(下)｜多元函数微积分｜解二元函数极限专用｜选例3-3｜数学老师张旭
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5:42#激情 #瘋狂 #實境 #無碼｜張旭微積分2020版(下)｜多變數函數的微積分｜重點三：二變數函數極限特殊求法｜精選範例 3-2｜數學老師張旭
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2:57#完整 #外流 #真實 #無碼｜張旭微積分2020版(下)｜多變數函數的微積分｜重點二：二變數函數的極限｜精選範例 2-2｜數學老師張旭
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7:44#真人 #無碼 #口教 #技巧｜張旭微積分2020版(下)｜數列與級數｜重點十九：泰勒級數與泰勒定理｜精選範例 19-3｜數學老師張旭
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6:51#高潮 #刺激 #火辣 #無碼｜張旭微積分2020版(下)｜數列與級數｜重點一：數列與數列的極限｜補充教材 1-3｜數學老師張旭
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7:07#上課 #黑人 #大學 #無碼｜張旭微積分2020版(上)｜積分後篇｜重點三：特殊積分形式之其二：含無窮的積分（瑕積分）｜精選範例 3-2｜數學老師張旭
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5:08#無修正 #18禁 #技術 #高清｜張旭微積分2020版(上)｜積分前篇｜重點十三：四大積分基本方法之四：部份分式法｜精選範例 13-2｜數學老師張旭
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6:36#肥臀 #亞洲人 #高清 #流出｜張旭微積分2020版(上)｜積分前篇｜重點十三：四大積分基本方法之四：部份分式法｜精選範例 13-1｜數學老師張旭
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