Youtube上的频道如 Dr. Kristina Dervaitis


1,540,000 2.64%

1,020,000 3.13%


2,070,000 2.26%

1,330,000 3.39%

190,000 0.81%

13,300 2.06%



1,130,000 0.9%

20,400,000 2.43%


3,210,000 2.78%

418,000 3.49%