BPG致力于知识的发现和传播
Total Visits of This Article
2018 | 总访问次数
排名 国家/地区 数量 占比
1 United States 23 32.9%
2 China 16 22.9%
3 Germany 12 17.1%
4 India 4 5.7%
5 Netherlands 4 5.7%
6 Iran, Islamic Republic of 3 4.3%
7 Austria 3 4.3%
8 Japan 2 2.9%
9 Hong Kong 1 1.4%
10 1 1.4%
11 Finland 1 1.4%