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 197 54%
2 United States 91 24.9%
3 Germany 23 6.3%
4 Hong Kong 12 3.3%
5 Taiwan 9 2.5%
6 Netherlands 9 2.5%
7 Russia 6 1.6%
8 Canada 3 0.8%
9 France 3 0.8%
10 Czech Republic 2 0.5%
11 Ireland 2 0.5%
12 Japan 2 0.5%
13 Turkmenistan 2 0.5%
14 United Kingdom 1 0.3%
15 Senegal 1 0.3%
16 Sweden 1 0.3%
17 Malaysia 1 0.3%