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 34 50.7%
2 China 9 13.4%
3 Germany 7 10.4%
4 Netherlands 5 7.5%
5 Iran, Islamic Republic of 3 4.5%
6 Hong Kong 2 3%
7 Denmark 2 3%
8 France 2 3%
9 Australia 2 3%
10 Canada 1 1.5%