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 31 44.3%
2 United States 20 28.6%
3 Germany 7 10%
4 Taiwan 4 5.7%
5 Hong Kong 3 4.3%
6 Iran, Islamic Republic of 2 2.9%
7 Portugal 1 1.4%
8 United Kingdom 1 1.4%
9 Finland 1 1.4%