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 165 55.2%
2 United States 57 19.1%
3 Germany 40 13.4%
4 France 8 2.7%
5 Korea, Republic of 7 2.3%
6 Russia 6 2%
7 United Kingdom 6 2%
8 Serbia 3 1%
9 Netherlands 3 1%
10 Singapore 2 0.7%
11 Ukraine 1 0.3%
12 Canada 1 0.3%