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 30 29.1%
2 China 19 18.4%
3 Netherlands 15 14.6%
4 Sweden 12 11.7%
5 Russia 10 9.7%
6 Korea, Republic of 8 7.8%
7 Germany 4 3.9%
8 Canada 2 1.9%
9 Ireland 1 1%
10 Czech Republic 1 1%
11 United Arab Emirates 1 1%