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 317 45.7%
2 United States 156 22.5%
3 Netherlands 96 13.8%
4 Germany 70 10.1%
5 Canada 16 2.3%
6 India 8 1.2%
7 Hong Kong 7 1%
8 Iran, Islamic Republic of 5 0.7%
9 France 5 0.7%
10 United Kingdom 3 0.4%
11 Ukraine 2 0.3%
12 Norway 2 0.3%
13 Serbia 2 0.3%
14 Korea, Republic of 2 0.3%
15 Finland 1 0.1%
16 Singapore 1 0.1%
17 Russia 1 0.1%