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 134 46.2%
2 United States 75 25.9%
3 Germany 34 11.7%
4 Canada 18 6.2%
5 Indonesia 6 2.1%
6 Taiwan 5 1.7%
7 Netherlands 4 1.4%
8 Russia 3 1%
9 Italy 3 1%
10 Sweden 2 0.7%
11 Hong Kong 2 0.7%
12 Czech Republic 2 0.7%
13 Ukraine 2 0.7%