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 41 42.7%
2 United States 36 37.5%
3 Germany 6 6.2%
4 Hong Kong 5 5.2%
5 Netherlands 2 2.1%
6 Switzerland 2 2.1%
7 United Kingdom 2 2.1%
8 Singapore 1 1%
9 Korea, Republic of 1 1%