BPG致力于知识的发现和传播
Total Visits of This Article
2017 | 总访问次数
排名 国家/地区 数量 占比
1 China 30 43.5%
2 Germany 17 24.6%
3 United States 11 15.9%
4 Nigeria 4 5.8%
5 India 3 4.3%
6 Iran, Islamic Republic of 1 1.4%
7 Philippines 1 1.4%
8 Taiwan 1 1.4%
9 United Kingdom 1 1.4%