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 United States 149 45.3%
2 China 100 30.4%
3 Germany 22 6.7%
4 Netherlands 19 5.8%
5 Russia 16 4.9%
6 Poland 5 1.5%
7 Korea, Republic of 5 1.5%
8 Ghana 4 1.2%
9 Hong Kong 2 0.6%
10 India 2 0.6%
11 Norway 2 0.6%
12 Canada 1 0.3%
13 Sweden 1 0.3%
14 Switzerland 1 0.3%