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 29 26.4%
2 China 26 23.6%
3 Netherlands 18 16.4%
4 Germany 13 11.8%
5 Russia 9 8.2%
6 Sweden 9 8.2%
7 Czech Republic 2 1.8%
8 Hong Kong 1 0.9%
9 Macao 1 0.9%
10 Canada 1 0.9%
11 Singapore 1 0.9%