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 28 31.8%
2 United States 14 15.9%
3 Netherlands 11 12.5%
4 Russia 8 9.1%
5 Canada 8 9.1%
6 Sweden 7 8%
7 Germany 6 6.8%
8 Czech Republic 2 2.3%
9 Singapore 2 2.3%
10 Romania 2 2.3%