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 43 35.8%
2 United States 29 24.2%
3 Netherlands 21 17.5%
4 France 7 5.8%
5 Iran, Islamic Republic of 6 5%
6 Germany 3 2.5%
7 Japan 2 1.7%
8 Czech Republic 2 1.7%
9 Senegal 2 1.7%
10 Canada 2 1.7%
11 Singapore 1 0.8%
12 Ghana 1 0.8%
13 Hong Kong 1 0.8%