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 39 56.5%
2 Canada 9 13%
3 United States 5 7.2%
4 Iran, Islamic Republic of 3 4.3%
5 Japan 3 4.3%
6 Netherlands 2 2.9%
7 Belgium 2 2.9%
8 Germany 2 2.9%
9 Italy 2 2.9%
10 Sweden 1 1.4%
11 Switzerland 1 1.4%