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 China 139 48.9%
2 United States 95 33.5%
3 Germany 13 4.6%
4 Switzerland 11 3.9%
5 Hong Kong 7 2.5%
6 Canada 4 1.4%
7 Taiwan 4 1.4%
8 United Kingdom 3 1.1%
9 Singapore 2 0.7%
10 Czech Republic 2 0.7%
11 Italy 1 0.4%
12 Japan 1 0.4%
13 Portugal 1 0.4%
14 Ukraine 1 0.4%