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 161 64.1%
2 United States 36 14.3%
3 Germany 24 9.6%
4 Canada 6 2.4%
5 Ireland 6 2.4%
6 Hong Kong 4 1.6%
7 Iran, Islamic Republic of 3 1.2%
8 Singapore 3 1.2%
9 Korea, Republic of 2 0.8%
10 India 2 0.8%
11 France 2 0.8%
12 Russia 1 0.4%
13 Sweden 1 0.4%