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 40 41.7%
2 United States 22 22.9%
3 Netherlands 9 9.4%
4 Russia 8 8.3%
5 Canada 7 7.3%
6 Germany 4 4.2%
7 France 2 2.1%
8 Czech Republic 2 2.1%
9 Finland 1 1%
10 Nigeria 1 1%