BPG致力于知识的发现和传播
Total Visits of This Article
2019 | 总访问次数
排名 国家/地区 数量 占比
1 25 54.3%
2 United States 8 17.4%
3 Germany 5 10.9%
4 China 3 6.5%
5 France 1 2.2%
6 Canada 1 2.2%
7 Russia 1 2.2%
8 Switzerland 1 2.2%
9 United Kingdom 1 2.2%