BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 171 73.7%
2 United States 18 7.8%
3 Germany 15 6.5%
4 Canada 6 2.6%
5 Portugal 5 2.2%
6 Hong Kong 5 2.2%
7 Taiwan 3 1.3%
8 Senegal 2 0.9%
9 United Kingdom 2 0.9%
10 Norway 2 0.9%
11 Russia 1 0.4%
12 1 0.4%
13 Ukraine 1 0.4%