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 31 21.7%
2 China 25 17.5%
3 Germany 18 12.6%
4 Denmark 17 11.9%
5 Netherlands 15 10.5%
6 France 7 4.9%
7 Mexico 6 4.2%
8 Russia 5 3.5%
9 Spain 4 2.8%
10 Portugal 3 2.1%
11 Canada 3 2.1%
12 Iran, Islamic Republic of 3 2.1%
13 Ireland 2 1.4%
14 Korea, Republic of 2 1.4%
15 Saudi Arabia 1 0.7%
16 United Kingdom 1 0.7%