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 73 38%
2 United States 67 34.9%
3 Germany 16 8.3%
4 Netherlands 14 7.3%
5 Hong Kong 4 2.1%
6 Japan 3 1.6%
7 Canada 3 1.6%
8 Taiwan 2 1%
9 Togo 2 1%
10 Korea, Republic of 2 1%
11 Russia 2 1%
12 France 2 1%
13 Senegal 1 0.5%
14 Turkey 1 0.5%