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 56 40%
2 China 25 17.9%
3 Netherlands 23 16.4%
4 Sweden 11 7.9%
5 Germany 7 5%
6 Korea, Republic of 6 4.3%
7 Russia 6 4.3%
8 Canada 3 2.1%
9 United Arab Emirates 2 1.4%
10 Czech Republic 1 0.7%