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 197 59.7%
2 United States 50 15.2%
3 Germany 40 12.1%
4 Canada 28 8.5%
5 Russia 4 1.2%
6 Singapore 2 0.6%
7 Taiwan 2 0.6%
8 Hong Kong 2 0.6%
9 France 2 0.6%
10 Japan 1 0.3%
11 United Arab Emirates 1 0.3%
12 United Kingdom 1 0.3%