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 39 39%
2 Netherlands 16 16%
3 United States 14 14%
4 Russia 9 9%
5 Germany 9 9%
6 Canada 8 8%
7 Czech Republic 2 2%
8 Singapore 1 1%
9 United Kingdom 1 1%
10 Portugal 1 1%