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 310 52.5%
2 United States 116 19.7%
3 Netherlands 102 17.3%
4 Germany 36 6.1%
5 Canada 12 2%
6 France 6 1%
7 Russia 3 0.5%
8 United Kingdom 2 0.3%
9 Hong Kong 2 0.3%
10 Switzerland 1 0.2%