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 United States 195 44.3%
2 China 180 40.9%
3 Germany 48 10.9%
4 Russia 4 0.9%
5 Singapore 2 0.5%
6 Moldova, Republic of 2 0.5%
7 France 2 0.5%
8 United Kingdom 2 0.5%
9 Canada 1 0.2%
10 Netherlands 1 0.2%
11 Sweden 1 0.2%
12 Taiwan 1 0.2%
13 Ukraine 1 0.2%