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 320 50.3%
2 United States 131 20.6%
3 Netherlands 77 12.1%
4 Germany 65 10.2%
5 Russia 13 2%
6 Canada 13 2%
7 France 4 0.6%
8 Taiwan 3 0.5%
9 Ukraine 2 0.3%
10 Korea, Republic of 2 0.3%
11 Switzerland 2 0.3%
12 Denmark 2 0.3%
13 Singapore 1 0.2%
14 India 1 0.2%