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 137 30.2%
2 United States 109 24%
3 Finland 98 21.6%
4 Germany 57 12.6%
5 Canada 37 8.1%
6 Taiwan 6 1.3%
7 Iran, Islamic Republic of 3 0.7%
8 Russia 2 0.4%
9 Singapore 2 0.4%
10 United Kingdom 2 0.4%
11 Hong Kong 1 0.2%