BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 40 43.5%
2 United States 27 29.3%
3 Germany 8 8.7%
4 Nigeria 4 4.3%
5 Russia 3 3.3%
6 Taiwan 3 3.3%
7 Hong Kong 3 3.3%
8 Iran, Islamic Republic of 1 1.1%
9 France 1 1.1%
10 United Kingdom 1 1.1%
11 Portugal 1 1.1%