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 226 54.1%
2 United States 130 31.1%
3 Germany 31 7.4%
4 United Kingdom 9 2.2%
5 Sweden 4 1%
6 Hong Kong 4 1%
7 Canada 3 0.7%
8 Taiwan 3 0.7%
9 Romania 2 0.5%
10 Netherlands 2 0.5%
11 Puerto Rico 1 0.2%
12 Russia 1 0.2%
13 Singapore 1 0.2%
14 Brazil 1 0.2%