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 56 32.7%
2 China 55 32.2%
3 Netherlands 18 10.5%
4 Germany 10 5.8%
5 Korea, Republic of 7 4.1%
6 Canada 7 4.1%
7 Russia 4 2.3%
8 France 3 1.8%
9 Egypt 2 1.2%
10 Ethiopia 2 1.2%
11 Nigeria 2 1.2%
12 United Kingdom 2 1.2%
13 Ukraine 1 0.6%
14 Palestine, State of 1 0.6%
15 Romania 1 0.6%