Yabla video uses of 红茶

实验 shíyàn
yòng
红茶 hóngchá
绿茶 lǜchá
茶叶 cháyè
zhōng
提取 tíqǔ
de
duō
fēn
lèi
化合物 huàhéwù
Through an experiment, to conduct the polyphenols contained in green tea, black tea and tea leaves,