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 United States 38 46.9%
2 China 26 32.1%
3 Germany 5 6.2%
4 Iran, Islamic Republic of 4 4.9%
5 United Kingdom 2 2.5%
6 Australia 2 2.5%
7 Canada 1 1.2%
8 Korea, Republic of 1 1.2%
9 Netherlands 1 1.2%
10 Singapore 1 1.2%