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 81 50.3%
2 China 31 19.3%
3 Germany 14 8.7%
4 Canada 7 4.3%
5 United Kingdom 5 3.1%
6 France 5 3.1%
7 Russia 4 2.5%
8 Senegal 4 2.5%
9 Taiwan 4 2.5%
10 Singapore 2 1.2%
11 Spain 2 1.2%
12 Moldova, Republic of 1 0.6%
13 Ukraine 1 0.6%