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 83 53.9%
2 United States 29 18.8%
3 Netherlands 11 7.1%
4 Germany 10 6.5%
5 Korea, Republic of 8 5.2%
6 Russia 4 2.6%
7 United Kingdom 3 1.9%
8 Hong Kong 2 1.3%
9 Switzerland 2 1.3%
10 Taiwan 2 1.3%