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 Finland 282 28.4%
2 United States 244 24.6%
3 China 240 24.2%
4 Germany 129 13%
5 Canada 80 8.1%
6 Iran, Islamic Republic of 8 0.8%
7 Netherlands 4 0.4%
8 Russia 3 0.3%
9 France 2 0.2%
10 Singapore 1 0.1%