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 219 53%
2 United States 133 32.2%
3 Germany 32 7.7%
4 India 11 2.7%
5 Russia 4 1%
6 Singapore 2 0.5%
7 Sweden 2 0.5%
8 Ukraine 2 0.5%
9 France 2 0.5%
10 Netherlands 2 0.5%
11 Canada 1 0.2%
12 Korea, Republic of 1 0.2%
13 Luxembourg 1 0.2%
14 Turkey 1 0.2%