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 United States 33 45.2%
2 Germany 18 24.7%
3 China 13 17.8%
4 Nigeria 4 5.5%
5 Switzerland 1 1.4%
6 Australia 1 1.4%
7 India 1 1.4%
8 Korea, Republic of 1 1.4%
9 Netherlands 1 1.4%