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 34 34%
2 United States 29 29%
3 Germany 19 19%
4 United Kingdom 6 6%
5 Hong Kong 4 4%
6 Canada 2 2%
7 1 1%
8 Japan 1 1%
9 Korea, Republic of 1 1%
10 Portugal 1 1%
11 Russia 1 1%
12 Taiwan 1 1%