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 United States 114 36.2%
2 China 110 34.9%
3 Germany 30 9.5%
4 Netherlands 28 8.9%
5 Korea, Republic of 12 3.8%
6 Russia 8 2.5%
7 Hong Kong 3 1%
8 France 2 0.6%
9 Senegal 2 0.6%
10 Lithuania 2 0.6%
11 Taiwan 2 0.6%
12 Sweden 1 0.3%
13 Kazakhstan 1 0.3%