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 64 55.2%
2 United States 23 19.8%
3 Germany 14 12.1%
4 Iran, Islamic Republic of 6 5.2%
5 Hong Kong 4 3.4%
6 Canada 2 1.7%
7 Portugal 1 0.9%
8 Sweden 1 0.9%
9 United Kingdom 1 0.9%