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 571 76.7%
2 United States 100 13.4%
3 Germany 37 5%
4 Canada 17 2.3%
5 Finland 4 0.5%
6 Russia 3 0.4%
7 Singapore 3 0.4%
8 Taiwan 3 0.4%
9 India 2 0.3%
10 Sweden 1 0.1%
11 France 1 0.1%
12 Australia 1 0.1%
13 Ukraine 1 0.1%