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 61.4%
2 United States 53 18%
3 Germany 41 13.9%
4 Hong Kong 3 1%
5 Japan 3 1%
6 Canada 3 1%
7 Taiwan 3 1%
8 United Kingdom 2 0.7%
9 Netherlands 2 0.7%
10 Russia 2 0.7%
11 France 1 0.3%
12 Korea, Republic of 1 0.3%