Youtube上的频道如 Partha's Physics


145,000 4.16%

329,000 6.73%

307,000 4.51%

1,320,000 4.7%


1,540,000 2.64%

298,000 1.32%

3,210,000 2.78%

3,300,000 3.43%

10,500,000 3.02%

4,070,000 2.84%