The major components of dark tea water are theaflavin and thearubigins.
黑茶汤色的主要组成成分是茶黄素和茶红素。
Green tea catechin and theaflavin, which are both present in black tea, have a strong effect on the flu virus.
绿茶儿茶酚，跟红茶里含有的一样，都对流行性病毒有很强的影响。
In addition, theaflavin has certain inhibiting effect against influenza virus, rotavirus virus and enter virus.
此外，茶黄素对流感病毒的侵袭和轮状病毒和肠病毒的感染有一定的抑制作用。
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