BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 United States 72 37.1%
2 China 57 29.4%
3 Germany 29 14.9%
4 Hong Kong 9 4.6%
5 Taiwan 8 4.1%
6 Netherlands 5 2.6%
7 Iran, Islamic Republic of 2 1%
8 Czech Republic 2 1%
9 Canada 2 1%
10 Japan 2 1%
11 Egypt 1 0.5%
12 Ireland 1 0.5%
13 Portugal 1 0.5%
14 Russia 1 0.5%
15 Ukraine 1 0.5%
16 United Kingdom 1 0.5%