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 162 53.8%
2 United States 59 19.6%
3 Germany 34 11.3%
4 Canada 16 5.3%
5 Russia 7 2.3%
6 Ireland 5 1.7%
7 Netherlands 5 1.7%
8 Hong Kong 3 1%
9 Denmark 3 1%
10 Brazil 2 0.7%
11 Singapore 2 0.7%
12 Switzerland 2 0.7%
13 Uzbekistan 1 0.3%