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 45 46.4%
2 United States 29 29.9%
3 Germany 13 13.4%
4 Hong Kong 3 3.1%
5 Portugal 1 1%
6 Russia 1 1%
7 Singapore 1 1%
8 Ukraine 1 1%
9 United Kingdom 1 1%
10 1 1%
11 Canada 1 1%