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 64 57.1%
2 Netherlands 15 13.4%
3 Germany 11 9.8%
4 France 6 5.4%
5 United States 6 5.4%
6 Iran, Islamic Republic of 5 4.5%
7 United Kingdom 2 1.8%
8 Russia 2 1.8%
9 Singapore 1 0.9%