Youtube上的频道如 Factual Civil Engineering


843,000 2.67%

540,000 3.55%




266,000 2.08%


121,000 2.53%

742,000 2.22%

779,000 2.11%

139,000 2.66%

760,000 1.68%


28,700 5.93%

120,000 1.71%

523,000 2.09%

3,390,000 1.13%

10,500,000 3.02%

45,700 3.15%



17,100 1.78%

148,000 3.19%

499,000 2.12%

63,300 2.81%