BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 United States 17 47.2%
2 China 5 13.9%
3 Finland 4 11.1%
4 France 4 11.1%
5 Kenya 2 5.6%
6 Korea, Republic of 1 2.8%
7 Netherlands 1 2.8%
8 Canada 1 2.8%
9 Germany 1 2.8%