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 230 63.2%
2 United States 66 18.1%
3 Germany 43 11.8%
4 Russia 6 1.6%
5 Netherlands 5 1.4%
6 Canada 3 0.8%
7 Singapore 2 0.5%
8 Hong Kong 2 0.5%
9 Finland 2 0.5%
10 Sweden 1 0.3%
11 Taiwan 1 0.3%
12 Turkey 1 0.3%
13 Ukraine 1 0.3%
14 Poland 1 0.3%