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 24 47.1%
2 Germany 6 11.8%
3 United States 6 11.8%
4 Russia 4 7.8%
5 United Kingdom 2 3.9%
6 Netherlands 2 3.9%
7 Canada 1 2%
8 Spain 1 2%
9 Sweden 1 2%
10 Taiwan 1 2%
11 Korea, Republic of 1 2%
12 Czech Republic 1 2%
13 France 1 2%