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 172 34.9%
2 United States 98 19.9%
3 Finland 90 18.3%
4 Germany 61 12.4%
5 Canada 61 12.4%
6 Lithuania 3 0.6%
7 Bulgaria 2 0.4%
8 Czech Republic 2 0.4%
9 Iran, Islamic Republic of 2 0.4%
10 Ireland 2 0.4%