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 113 38.4%
2 United States 82 27.9%
3 Germany 23 7.8%
4 Netherlands 18 6.1%
5 Canada 15 5.1%
6 Greece 9 3.1%
7 Korea, Republic of 6 2%
8 United Kingdom 5 1.7%
9 Argentina 5 1.7%
10 Iran, Islamic Republic of 3 1%
11 Japan 3 1%
12 France 3 1%
13 Romania 2 0.7%
14 India 2 0.7%
15 Czech Republic 2 0.7%
16 Denmark 2 0.7%
17 Singapore 1 0.3%