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 171 58.2%
2 United States 46 15.6%
3 Germany 39 13.3%
4 Canada 19 6.5%
5 France 3 1%
6 Iran, Islamic Republic of 3 1%
7 Japan 3 1%
8 Russia 3 1%
9 Hong Kong 2 0.7%
10 Sweden 2 0.7%
11 Turkey 2 0.7%
12 Singapore 1 0.3%