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 41 52.6%
2 United States 21 26.9%
3 Germany 5 6.4%
4 Hong Kong 3 3.8%
5 Taiwan 3 3.8%
6 Iran, Islamic Republic of 2 2.6%
7 Ireland 1 1.3%
8 Portugal 1 1.3%
9 United Kingdom 1 1.3%