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 27 45.8%
2 China 11 18.6%
3 Netherlands 6 10.2%
4 Russia 6 10.2%
5 Korea, Republic of 2 3.4%
6 United Kingdom 2 3.4%
7 Sweden 1 1.7%
8 France 1 1.7%
9 Germany 1 1.7%
10 Austria 1 1.7%
11 Brazil 1 1.7%