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 43 46.2%
2 China 23 24.7%
3 Netherlands 12 12.9%
4 Canada 5 5.4%
5 Germany 3 3.2%
6 Sweden 2 2.2%
7 United Arab Emirates 1 1.1%
8 Russia 1 1.1%
9 Serbia 1 1.1%
10 Japan 1 1.1%
11 France 1 1.1%