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 15 37.5%
2 United States 11 27.5%
3 Germany 2 5%
4 Iran, Islamic Republic of 2 5%
5 Korea, Republic of 2 5%
6 Poland 2 5%
7 Sweden 2 5%
8 Taiwan 2 5%
9 United Kingdom 1 2.5%
10 Netherlands 1 2.5%