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 51 46.4%
2 United States 25 22.7%
3 Germany 13 11.8%
4 France 6 5.5%
5 Netherlands 5 4.5%
6 Iran, Islamic Republic of 2 1.8%
7 Russia 2 1.8%
8 United Kingdom 2 1.8%
9 Norway 1 0.9%
10 Hong Kong 1 0.9%
11 Albania 1 0.9%
12 Canada 1 0.9%