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 220 64.5%
2 United States 45 13.2%
3 Germany 36 10.6%
4 Canada 19 5.6%
5 Hong Kong 6 1.8%
6 Taiwan 3 0.9%
7 United Kingdom 2 0.6%
8 Russia 2 0.6%
9 Singapore 2 0.6%
10 Sweden 2 0.6%
11 Japan 1 0.3%
12 Mexico 1 0.3%
13 Moldova, Republic of 1 0.3%
14 Norway 1 0.3%