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 181 59.7%
2 United States 55 18.2%
3 Germany 34 11.2%
4 Canada 17 5.6%
5 Russia 5 1.7%
6 Netherlands 3 1%
7 Singapore 2 0.7%
8 United Kingdom 2 0.7%
9 Czech Republic 2 0.7%
10 India 1 0.3%
11 Korea, Republic of 1 0.3%