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 22 34.4%
2 China 18 28.1%
3 Netherlands 9 14.1%
4 Iran, Islamic Republic of 3 4.7%
5 United Kingdom 3 4.7%
6 Serbia 2 3.1%
7 Ukraine 2 3.1%
8 Canada 2 3.1%
9 Hong Kong 2 3.1%
10 France 1 1.6%