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 46 53.5%
2 United States 16 18.6%
3 Netherlands 14 16.3%
4 Canada 3 3.5%
5 Australia 2 2.3%
6 Iran, Islamic Republic of 2 2.3%
7 Taiwan 1 1.2%
8 United Kingdom 1 1.2%
9 Germany 1 1.2%