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 53 50.5%
2 United States 29 27.6%
3 Germany 7 6.7%
4 Hong Kong 7 6.7%
5 Korea, Republic of 2 1.9%
6 United Kingdom 2 1.9%
7 Canada 1 1%
8 Portugal 1 1%
9 South Africa 1 1%
10 Sweden 1 1%
11 Japan 1 1%