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 34 46.6%
2 United States 15 20.5%
3 Netherlands 10 13.7%
4 Germany 5 6.8%
5 Hong Kong 2 2.7%
6 Serbia 2 2.7%
7 Sweden 2 2.7%
8 Russia 1 1.4%
9 France 1 1.4%
10 Canada 1 1.4%