BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 67 39.2%
2 United States 51 29.8%
3 Germany 19 11.1%
4 Korea, Republic of 7 4.1%
5 Netherlands 5 2.9%
6 Russia 5 2.9%
7 Senegal 4 2.3%
8 Taiwan 3 1.8%
9 Brazil 2 1.2%
10 Hong Kong 2 1.2%
11 Finland 2 1.2%
12 France 2 1.2%
13 Sweden 1 0.6%
14 United Kingdom 1 0.6%