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 281 68%
2 United States 58 14%
3 Germany 38 9.2%
4 Canada 14 3.4%
5 Netherlands 11 2.7%
6 Hong Kong 4 1%
7 Singapore 2 0.5%
8 United Kingdom 2 0.5%
9 Austria 2 0.5%
10 Iran, Islamic Republic of 1 0.2%