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 27 28.1%
2 United States 17 17.7%
3 Netherlands 15 15.6%
4 Canada 11 11.5%
5 Germany 7 7.3%
6 Russia 7 7.3%
7 Sweden 6 6.2%
8 Singapore 2 2.1%
9 Czech Republic 2 2.1%
10 Portugal 1 1%
11 Switzerland 1 1%