BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 45 46.4%
2 United States 15 15.5%
3 Netherlands 14 14.4%
4 Germany 9 9.3%
5 Russia 5 5.2%
6 Canada 3 3.1%
7 France 2 2.1%
8 Taiwan 2 2.1%
9 United Kingdom 2 2.1%