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 28 28.9%
2 China 25 25.8%
3 Netherlands 15 15.5%
4 Canada 7 7.2%
5 Germany 7 7.2%
6 Russia 5 5.2%
7 Sweden 5 5.2%
8 Singapore 2 2.1%
9 Czech Republic 2 2.1%
10 Portugal 1 1%