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 59 58.4%
2 China 22 21.8%
3 Netherlands 8 7.9%
4 Korea, Republic of 5 5%
5 United Kingdom 2 2%
6 France 2 2%
7 Germany 1 1%
8 Hong Kong 1 1%
9 Russia 1 1%