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 United States 70 45.5%
2 China 40 26%
3 Netherlands 16 10.4%
4 Russia 11 7.1%
5 Germany 8 5.2%
6 France 3 1.9%
7 Korea, Republic of 2 1.3%
8 Moldova, Republic of 2 1.3%
9 Finland 1 0.6%
10 United Kingdom 1 0.6%