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 196 53.8%
2 United States 96 26.4%
3 Germany 37 10.2%
4 Taiwan 7 1.9%
5 United Kingdom 5 1.4%
6 Iran, Islamic Republic of 5 1.4%
7 Russia 4 1.1%
8 Hong Kong 4 1.1%
9 Brazil 3 0.8%
10 Egypt 2 0.5%
11 Sweden 2 0.5%
12 Malaysia 2 0.5%
13 Ukraine 1 0.3%