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 86 36%
2 United States 73 30.5%
3 Netherlands 23 9.6%
4 Sweden 18 7.5%
5 Germany 16 6.7%
6 Russia 7 2.9%
7 Korea, Republic of 4 1.7%
8 France 3 1.3%
9 Moldova, Republic of 3 1.3%
10 Luxembourg 2 0.8%
11 Mauritius 1 0.4%
12 Canada 1 0.4%
13 Estonia 1 0.4%
14 Poland 1 0.4%