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 204 50.9%
2 United States 63 15.7%
3 Germany 54 13.5%
4 Netherlands 32 8%
5 Sweden 16 4%
6 Canada 11 2.7%
7 4 1%
8 India 3 0.7%
9 Russia 3 0.7%
10 Ukraine 2 0.5%
11 Bulgaria 2 0.5%
12 France 1 0.2%
13 Ireland 1 0.2%
14 Japan 1 0.2%
15 Korea, Republic of 1 0.2%
16 Singapore 1 0.2%
17 Philippines 1 0.2%
18 Hong Kong 1 0.2%