C
N
N nm E E E C GB P H
nm A A B
p H
T F T R
China and tea
Black tea
a b a b b
A D E K A C BBB B B P C
C B C C C C B B B B B B
SOD E
ECG EGC
A
A B A
A A B C A B
A B B A B B A
A B C C A