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 72 53.7%
2 United States 28 20.9%
3 Germany 9 6.7%
4 Korea, Republic of 7 5.2%
5 Taiwan 6 4.5%
6 Senegal 4 3%
7 Hong Kong 4 3%
8 Netherlands 3 2.2%
9 Iran, Islamic Republic of 1 0.7%