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 53 43.8%
2 United States 24 19.8%
3 Netherlands 16 13.2%
4 Germany 9 7.4%
5 France 8 6.6%
6 Russia 7 5.8%
7 Czech Republic 2 1.7%
8 Sweden 1 0.8%
9 United Arab Emirates 1 0.8%