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 209 51.4%
2 United States 113 27.8%
3 Germany 37 9.1%
4 Netherlands 26 6.4%
5 Korea, Republic of 5 1.2%
6 Japan 3 0.7%
7 Russia 3 0.7%
8 Iran, Islamic Republic of 3 0.7%
9 Hong Kong 2 0.5%
10 South Africa 2 0.5%
11 Sweden 2 0.5%
12 Ireland 1 0.2%
13 Canada 1 0.2%