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详细讲解，看上面视频。","preview":{"posterSrc":"//avatars.mds.yandex.net/get-vthumb/754438/c23c5cc9011ae7e6cc6092788f87a3cb/564x318_1","videoSrc":"https://video-preview.s3.yandex.net/V_Rv3gAAAAA.mp4","videoType":"video/mp4"},"target":"_self","position":"19","reqid":"1765393845849034-4112871508599226685-balancer-l7leveler-kubr-yp-sas-72-BAL","summary":{"fullTextUrl":"/int_search_summary?data=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dqth0-o0ORzI","linkTemplate":"/video/preview/16202419782727400592?parent-reqid=1765393845849034-4112871508599226685-balancer-l7leveler-kubr-yp-sas-72-BAL&text=%E5%B0%8F%E5%85%83%E8%80%81%E5%B8%88and%E5%AE%87%E5%AE%99%E6%95%B0%E5%AD%A6%E4%B8%AD%E5%BF%83&t=%%timestamp%%&ask_summarization=1"},"isAdultDoc":false,"relatedParams":{"text":"【动画数学课】拉格朗日乘数法几何原理解释1【小元老师】高等数学下，考研数学","related_orig_text":"小元老师and宇宙数学中心","related_porno":false,"related_less_3m_off":true,"client":"d2d","no_cnt":1,"related_src":"serp","related":"{\"porno\":false,\"vfp\":1,\"orig_text\":\"小元老师and宇宙数学中心\",\"url\":\"http:\\/\\/www.youtube.com\\/watch?v=qth0-o0ORzI\",\"src\":\"serp\",\"rvb\":\"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_wH_-wYA9v4DBf4F_gHlCP_9_AAAAPwB-wX9Bf4A7gb-_gP_AAD-CwYCAAAAAAEHAf7y_gEADAIG_f0AAAD59_z9_AAAAAcG_wL-AQAA_Qf-BgP_AAAU-wEE9f4BAPcOAQMBAAAACwj5_AEAAAD77f7_AAAAACAALcSf4zs4E0AJSE5QAiqEAhAAGvABfxAwAMn6y_-z_vQA4PjhAMYS6gAJNPAAm83zALno3QEGKAsA_OwX_0bLDP-vLPf_Jw7h_-3n6gA3xiT_C_kEANcC_AET-Q8AVRgSAf_x3_7PGgH-2AQC__XXzv4EJtf-Bun6AhX4uwHqJ9IDJ_syASLqKQLi7v4B5N_S_sT4-Aj85Nz93g4LBBr0GfznCCkBJdTPBzUsCPy-FvoEEfsfBRPX7gMvOtL_8RDn-ssXGAfYyPoHI88J_ucmH_7yAuP42_f0CtHjFfYt4Q4LBtYS9Pjt8gsRGAcFAdcW_CDW_wjxP_4G_u0B_f0A5ggDue33IAAt4GkJOzgTQAlIYVACKnMQABpgSA4AChRsHwkdGd3u1_lBxOLE3sfU_P8W0v8iDQghDPHvyeb7_wTvKe6fAAAAB_n4DgcA2Hka1f1AEjgfrIHWGUlfEyYr0PhH_t81Jv70Dj8hMvcKAMgLyiwdA_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_AAB4QgAA2MEAAABBAACAQAAALEIAAPjBAAAwwgAAyMEAAEDAAAAYQgAAqMIAAPBBAAAUQgAAQEEAANDBAABAwQAAgEAAALrCAABkQgAAoEEAAGRCAACwQQAAmMEAADTCAACoQQAAeMIAAIDBAABowgAAQEEAAJRCAACgQQAABEIAANBBAACQwQAACEIAAMhBAADQwQAA6MEAAARCAADgwAAAiMIAAHTCAAAAQgAAqEEAAADCAACoQQAA0EEAALbCAAAowgAAqMEAAKhBAACSQgAAisIAAODBAAAwQQAAcMEAAKDAAACgwAAABEIAAEDAAAAIwgAA-EEAABBCAACYwQAAMEEAACRCAADAwSAAOBNACUh1UAEqjwIQABqAAgAAEL0AAAy-AAB0PgAAML0AAOC8AAB0PgAAhr4AAOq-AACIPQAAgLsAAFw-AAAwvQAAoDwAABw-AADIvQAA4LwAAGw-AAC4vQAABL4AAHA9AAB_PwAAoDwAADS-AAAUPgAAfL4AAEy-AAAQvQAAqL0AANg9AADgPAAAiD0AAKC8AABEvgAAgDsAALg9AABcvgAA2D0AAIA7AAB0vgAAqL0AADQ-AACAOwAAEL0AAOA8AAAsvgAA6L0AAJo-AACIPQAAuL0AAJa-AABwvQAAoLwAALo-AACIPQAAdL4AABA9AAAbPwAAcL0AAIC7AAAQvQAAgr4AADC9AAAQvQAA2L0gADgTQAlIfFABKo8CEAEagAIAAGy-AACgvAAAcD0AAAm_AABMPgAA6D0AADQ-AAA0PgAAhr4AAEQ-AADovQAAuL0AABC9AADYvQAAuL0AAOC8AACovQAAJz8AADC9AACYPQAAMD0AAOi9AABAvAAAmD0AAEA8AAAwvQAAcL0AAKi9AAD4PQAAyD0AABA9AADgvAAAFL4AAPg9AAAQvQAA6L0AAKY-AABUvgAA6L0AANg9AAAQPQAABL4AACQ-AADoPQAAMD0AAHC9AAB_vwAA4DwAAHC9AABMPgAAuD0AAJg9AADePgAAML0AAAS-AABAvAAA4LwAADC9AAAwPQAAyD0AAKA8AABAvAAAir4AADC9IAA4E0AJSHxQATAJOAFKAGAAaAA,\"}","related_url":"http://www.youtube.com/watch?v=qth0-o0ORzI","parent-reqid":"1765393845849034-4112871508599226685-balancer-l7leveler-kubr-yp-sas-72-BAL","related_vfp":1,"relatedVideo":"yes"},"cwidth":1920,"cheight":1080,"cratio":1.77777,"dups":["16202419782727400592"],"episode":0,"season":0,"isEmbedOnly":false,"greenHost":"YouTube","hasTranslation":true,"contentTypeId":null,"censored":false}},"dups":{"2473693102037441291":{"videoId":"2473693102037441291","title":"考研\u0007[数\u0007]\u0007[学\u0007]复习全书2020【\u0007[小\u0007]\u0007[元\u0007]\u0007[老\u0007]\u0007[师\u0007]】","cleanTitle":"考研数学复习全书2020【小元老师】","host":{"title":"YouTube","hre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