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 13 39.4%
2 China 9 27.3%
3 Japan 3 9.1%
4 Hong Kong 2 6.1%
5 Canada 1 3%
6 Germany 1 3%
7 Netherlands 1 3%
8 Russia 1 3%
9 Spain 1 3%
10 United Kingdom 1 3%