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 12 29.3%
2 Netherlands 10 24.4%
3 Germany 6 14.6%
4 Hong Kong 4 9.8%
5 United States 4 9.8%
6 Iran, Islamic Republic of 2 4.9%
7 France 2 4.9%
8 United Kingdom 1 2.4%