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 124 64.2%
2 United States 35 18.1%
3 Germany 16 8.3%
4 Hong Kong 4 2.1%
5 Russia 3 1.6%
6 Burkina Faso 2 1%
7 Brazil 2 1%
8 Japan 2 1%
9 Korea, Republic of 2 1%
10 Netherlands 2 1%
11 Bulgaria 1 0.5%