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 United States 22 27.2%
2 China 21 25.9%
3 United Kingdom 14 17.3%
4 Russia 8 9.9%
5 France 3 3.7%
6 Germany 3 3.7%
7 Iran, Islamic Republic of 2 2.5%
8 Ukraine 2 2.5%
9 Estonia 2 2.5%
10 Mexico 1 1.2%
11 Czech Republic 1 1.2%
12 Hong Kong 1 1.2%
13 India 1 1.2%