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 194 62.2%
2 United States 50 16%
3 Germany 28 9%
4 Canada 26 8.3%
5 Korea, Republic of 4 1.3%
6 Russia 3 1%
7 Sweden 2 0.6%
8 United Kingdom 2 0.6%
9 Hong Kong 2 0.6%
10 Netherlands 1 0.3%