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 United States 76 30.9%
2 China 71 28.9%
3 Germany 24 9.8%
4 Netherlands 24 9.8%
5 Russia 15 6.1%
6 Korea, Republic of 7 2.8%
7 Senegal 6 2.4%
8 Sweden 3 1.2%
9 Nigeria 3 1.2%
10 Norway 3 1.2%
11 France 3 1.2%
12 Australia 2 0.8%
13 Hong Kong 2 0.8%
14 Singapore 2 0.8%
15 Spain 2 0.8%
16 Turkey 1 0.4%
17 United Kingdom 1 0.4%
18 Canada 1 0.4%