#有料 #實境 #教師 #高清|張旭微積分2020版(下)|向量微積分|重點七:線積分|精選範例7-4|數學老師張旭 4:32Playback unverified + Watch later ← Browse more videos Report video Categories SFW Verified Amateurs Tags chinese math-teacher outside POV public Retro university