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 487 43.1%
2 Netherlands 220 19.5%
3 United States 208 18.4%
4 Germany 91 8.1%
5 France 79 7%
6 Canada 16 1.4%
7 Sweden 11 1%
8 United Kingdom 6 0.5%
9 Singapore 4 0.4%
10 Korea, Republic of 3 0.3%
11 Ukraine 1 0.1%
12 Finland 1 0.1%
13 India 1 0.1%
14 Nigeria 1 0.1%
15 Russia 1 0.1%