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 311 48.4%
2 United States 140 21.8%
3 Netherlands 89 13.9%
4 Germany 40 6.2%
5 Canada 20 3.1%
6 Russia 12 1.9%
7 Sweden 11 1.7%
8 France 5 0.8%
9 Singapore 4 0.6%
10 Ukraine 3 0.5%
11 Taiwan 2 0.3%
12 Luxembourg 2 0.3%
13 India 2 0.3%
14 Korea, Republic of 1 0.2%