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 175 25.3%
2 Finland 169 24.4%
3 United States 151 21.8%
4 Germany 94 13.6%
5 Canada 80 11.6%
6 Taiwan 7 1%
7 Russia 4 0.6%
8 Poland 3 0.4%
9 Iran, Islamic Republic of 3 0.4%
10 Netherlands 2 0.3%
11 Hong Kong 2 0.3%
12 Indonesia 1 0.1%
13 Japan 1 0.1%