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 United States 29 34.5%
2 China 25 29.8%
3 Netherlands 15 17.9%
4 Germany 7 8.3%
5 Hong Kong 3 3.6%
6 Canada 1 1.2%
7 Portugal 1 1.2%
8 Russia 1 1.2%
9 Sweden 1 1.2%
10 United Kingdom 1 1.2%