Youtube上的频道如 Profa. Windyz B. Ferreira, PhD


191,000 7.56%

40,800 10.12%


166,000 8.54%

3,390,000 1.13%

5,570 8.11%

9,790 8.92%


51,800 11.16%

215,000 5.6%

70,000 7.21%