BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 175 58.1%
2 United States 49 16.3%
3 Germany 46 15.3%
4 Netherlands 14 4.7%
5 Hong Kong 4 1.3%
6 Japan 3 1%
7 Russia 3 1%
8 Taiwan 2 0.7%
9 United Kingdom 2 0.7%
10 Denmark 2 0.7%
11 Canada 1 0.3%